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Do Penis Pumps Work? What Studies and 3,490 Men Show
A straight answer for each goal: firmer erections, a bigger look, lasting girth and length. With the published studies, what urology groups say, and what thousands of men logged in our app.
Yes, penis pumps work. What they do depends on your goal. A pump makes you hard within minutes, which is its best-proven use. It makes you bigger and fuller for a few hours after a session. And for men who keep pumping for months, it builds girth. In our app, 82% of men who pumped at least 1.5 days a week for a year measured thicker, and the top 10% gained +0.79 inches or more. When men stopped pumping, the typical man kept his girth months later.
What a pump does not do is add length. That is the job of a penis extender.
76%
of men who use a pump for erections were satisfied, across 12 studies
82%
of men who pumped steadily for a year measured thicker
+0.79"
girth gained by the top 10% of steady pumpers, or more
0.00"
typical girth change months after men stopped pumping
What Does a Penis Pump Do?
A penis pump is a clear cylinder that goes over your penis, with a pump that pulls the air out. Doctors call it a vacuum erection device, or VED. You may also see it called a vacuum pump or a penile pump. It pulls blood into the penis, so you get hard and fuller than normal.
A pump head and its cylinder. Real photo from Baseem's video.
How Does a Penis Pump Work?
The vacuum does the work. When air leaves the cylinder, the pressure inside drops, and blood flows into the spongy tissue of the penis until it is fuller than a normal erection.
Air goes out. Blood comes in.
Seal. The cylinder rests against your body. A little lube or a soft pad makes it airtight.
Pump. The pump pulls air out and blood flows in. A British urology leaflet says "It only takes a few minutes to obtain a full erection using a vacuum device." (BAUS).
Release. Let the air back in and take the cylinder off. For sex, a ring at the base holds the erection. It must come off within 30 minutes.
Repeat. For size training, men skip the ring and pump in short sets with breaks, a few days a week.
That one action does three different jobs. So the honest answer to "do penis pumps work" depends on which job you want done.
Pump vs Extender, Which One Actually Builds Size?Baseem on YouTube · 5 min
Do Penis Pumps Really Work? It Depends on Your Goal
Men buy pumps for different reasons, and the proof is not the same for each one. Here is the answer for every goal, and what it is based on.
A pump does three of these four jobs.
Your goal
Does a pump work?
Based on
A firm erection for sex
Yes. The best-proven use
12 studies of men with erection problems. About 76% were satisfied
Looking bigger right away
Yes, for a few hours
Blood and fluid fill the tissue. It fades the same day
Lasting girth
Yes, for men who keep at it
Our app. 82% of steady pumpers were thicker after a year. Few trials have tested it
Lasting length
Non
A 6-month study found no real change. An extender is the tool for length
Keeping your size after prostate surgery
Yes
3 studies. Men who pumped kept their length
Firmer erections day to day
Many men say so
Reports from our buyers and our Discord. Not measured in our app
Study numbers come from men who used pumps for erection problems or after surgery. Girth numbers come from our free PE Trainer app. They are self-measured, not a clinical trial. Results vary.
Do Penis Pumps Work for Erections?
Yes. This is what pumps were first made for, and it is where the research is strongest. Penis pumps have been a standard treatment for erectile dysfunction (ED) for decades.
In the US, the FDA classes vacuum pumps and constriction rings as Class II devices for getting and keeping an erection (21 CFR 876.5020). The American Urological Association says men with ED should be told about pumps as a treatment option. When it pooled 12 studies, about 76% of men were satisfied with their pump, and single studies ranged from 34% to 100% (AUA guideline).
Doctors suggest pumps to men who cannot take ED medication, or who want a treatment without pills. The pump gets you hard, and a ring at the base keeps you hard for sex.
Do Vacuum Erection Devices Work to Improve Your Erections? A Urologist Explains HowDr. Rena Malik on YouTube · 6 min
In this video, urologist Dr. Rena Malik says that across studies, 84 to 92% of men got a satisfactory erection with a vacuum device. She also covers the risks, like bruising and numbness.
Do Pumps Make Your Erections Better Over Time?
Many men say so. Every session brings fresh blood into the erectile tissue. Men in our Discord often say their erections feel firmer once they pump regularly, and it is usually the first change they notice. One verified buyer wrote, "After the first 2 weeks I wake up with morning wood bigger and thicker than I have had in many years." We have not measured this in our app, so take it as what men report.
Is a Pump Better Than Viagra?
They are different tools. A pill is easier. A pump is drug-free and works in minutes. Some men use both, but ask your doctor first. In one trial after prostate surgery, men used a pump and a daily ED pill together (Zhang 2022).
Do Penis Pumps Work After Prostate Surgery?
Yes. After prostate surgery many men lose their night erections for months, and the penis can shrink. Daily pumping keeps blood flowing to the tissue. Three studies show it.
Randomized, 28 men
About 2 cm saved
After prostate surgery, men who pumped 10 minutes a day kept their stretched length. Men who waited lost about 2 cm.
An international panel of sexual medicine experts agrees that a vacuum pump can preserve or restore penile size after prostate surgery (Wang 2025). Talk to your urologist about when to start.
If you have erection problems, talk to a doctor first. They can check for causes that a pump will not fix. How to use a ring safely is in how to use a penis pump for ED.
Do Penis Pumps Make You Bigger?
Yes, in two ways. Right away, for a few hours. And slowly, in girth, if you keep pumping for months. 3,490 men have logged 31,227 hours of pumping in our free PE Trainer app, and many of them measured their girth months apart. That makes it one of the largest looks at real pumping results anywhere.
Right After a Session
A pump fills you with more blood than a normal erection can, so you come out thicker and heavier. It lasts a few hours. A lot of men pump before sex for this reason alone.
As a person who hadn't used pumps before this, I was amazed at Just how large it made me on the first pump.
Verified Epic Pump buyer, review on our store
Been using for a couple months and love it, you notice a good size increase after each use
3 in 1 Pump buyer, review on our store
This same-day size is blood and fluid. Enjoy it, but do not measure it. Measure on a rest day.
Over Months, Girth Builds
Each session fills the tissue past its normal size. Doing this again and again, over months, slowly stretches the tissue and the tough sheath around it, so it holds a little more blood every time. That is how girth builds. Few trials have tested pumps for girth in healthy men, so our app data is the best look we have at what steady pumping really does.
The men who gained were the ones who kept logging sessions, month after month.
Here is erect girth change in our app, from each man's first measurement to his latest, by how steadily he pumped.
Who
Measured thicker
Typical
Top 25%
Top 10%
Men
Pumped 10+ hours in total
65%
+0.13"
+0.39"
+0.59"
278
1.5+ days a week for 6 months
74%
+0.24"
+0.47"
+0.67"
106
1.5+ days a week for a year
82%
+0.28"
+0.47"
+0.79"
55
PE Trainer app, erect girth, self-measured. The best result among steady pumpers was +1.22". Results vary.
The men who stuck with it did best. 82% measured thicker after a year, and 1 in 10 gained 0.79 inches or more. Girth goes all the way around, so a small number in inches is a change you can see and feel. Hours tell the same story. The more men pumped, the more of them gained.
No pumping logged734 men42%
Under 10 pump hours731 men50%
10 to 50 pump hours240 men62%
50+ pump hours82 men72%
Share who gained any erect girth between their first and latest measurement, by pump hours logged. Men who logged nothing still show some "gains" because measuring is never perfect, so compare the groups.
Who Gains the Most?
In our app, pumpers who started thinner gained more girth than men who started thick.
Starting girth
Typical gain
Gained
Men
Under 4.75"
+0.24"
71%
59
4.75 to 5.25"
+0.20"
71%
98
Over 5.25"
+0.08"
61%
127
Every way to add girth, with prices and risks, is in our guide on how to increase girth.
Do Penis Pumps Increase Length?
Not on their own. One study tested it. 37 men pumped 20 minutes, 3 times a week, for 6 months, and their length did not change in a way that counted (Aghamir 2006). Expert panels in urology say the same. Length is the job of a penis extender. In our app, 90% of men who logged 250 or more hours on an extender measured longer. See the proof in do penis extenders work.
Are Penis Pump Results Permanent?
The size right after a session is not. The girth you build slowly over months is a different story, and studies do not answer it. So we checked our own app. We looked for men who measured their girth while pumping, then stopped pumping, and measured again later.
We looked for men who stopped pumping and measured again months later.
We found 33 of them. The typical man measured again 6 months after his last pump session. His girth had not dropped. The typical change after stopping was 0.00 inches. Of the 13 men who had gained at least 0.2 inches while pumping, 11 kept at least half of it and 8 kept all of it.
Thicker than at the start, while pumping33 men79%
Still thicker, months after stopping33 men76%
PE Trainer app. Men with at least 5 pump hours, a measurement near the start of pumping, measurements while pumping, and one at least 6 weeks after their last session. With stricter rules (10+ pump hours and 8+ weeks off), 14 men, and the typical change after stopping was still 0.00 inches. Self-measured. Small group, so treat this as a good sign, not proof.
That fits what our coaches see. The big size right after a session is swelling and fades within hours. The slow change you build over months, measured on rest days, is the part that tends to stay.
How Long Do Penis Pumps Take to Work?
It depends on what you are waiting for. An erection takes minutes. Firmer erections day to day take weeks. Girth you can measure takes months.
Minutes, hours, weeks, then months.
MinutesA full erection. This is why pumps are used for ED.
HoursThe fuller, heavier look after a session. It fades the same day.
WeeksMany men notice stronger morning erections and better feeling.
MonthsMeasured girth starts to move around month 3 and keeps building.
These are men who pumped at least 10 hours in total and measured that month.
When
Typical
Top 10%
Men
Month 1
+0.04"
+0.35"
166
Month 3
+0.12"
+0.50"
149
Month 6
+0.12"
+0.51"
96
Month 9
+0.20"
+0.59"
69
Month 12
+0.20"
+0.63"
45
Erect girth change against each man's first measurement. Typical means the middle man. Self-reported, not a clinical trial.
Hours matter as much as months. 72% of men who logged 50 or more hours of pumping measured thicker, and 48% gained a quarter inch or more. At a typical 20 minutes a session, 3 days a week, 50 hours takes about a year.
How Long Does a Pump Keep You Hard or Bigger?
The swelling right after a session fades within a few hours. For sex, a constriction ring keeps the erection after you take the cylinder off, for up to 30 minutes. Lasting girth only comes from months of steady sessions.
The month by month chart is in our guide to the best penis pumps.
Why Pumps Do Not Work for Some Men
When a man says his pump did nothing, it is almost always one of these six things. None of them is the pump.
Most men stop before the results arrive.
He stopped too soonGirth takes months. Only about 1 in 12 men who log a pump session ever reach 50 hours.
He measured at the wrong timeRight after a session you are swollen. Later the swelling fades, and it looks like the gain is gone. Measure on rest days.
Too much pressureMore pressure did not mean more girth in our data. It mostly buys swelling, red spots and forced days off.
The wrong cylinderToo narrow and there is no room to expand. Too wide and it pulls in skin. Use our cylinder sizing calculator.
No gaugeYou cannot repeat a session you cannot measure. Our coaches see this most with cheap pumps that have no gauge.
He wanted lengthA pump builds girth. Length is what an extender is for.
Most Men Quit Before the Results Arrive
Of 4,845 men who logged a pump session in our app, here is how many kept logging sessions for at least this long.
Still pumping after 1 week46%
After 1 month35%
After 3 months23%
After 6 months15%
After 1 year8%
Time between a man's first and latest pump session in the PE Trainer app.
More Pressure Did Not Mean More Girth
Men pumping under 5 inHg had a typical gain of +0.12 inches. At 5 to 7 inHg it was +0.14, at 7 to 9 it was +0.12, and over 11 it was +0.08. Steady, moderate sessions win.
Urology groups back pumps for erections and for recovery after surgery. On size, they treat length and girth as two separate questions. Here are their own words.
Guidelines back pumps for erections and for recovery after surgery.
Men with ED should be informed regarding the treatment option of a vacuum erection device (VED), including discussion of benefits and risks/burdens.
American Urological Association, ED guideline. Source
VED can preserve or restore penile size for patients after RP
International Consultation on Sexual Medicine, 2024. RP means prostate removal surgery. Source
several studies have reported that VED improves penile circumference more than length.
International Consultation on Sexual Medicine, 2024, chapter on enlargement. Circumference means girth. Source
On length, the same panels are clear. A pump does not make a normal penis longer (ICSM 2024, European Association of Urology). That matches the one study that tested it, and it is why we point men who want length to an extender.
No urology group recommends a pump for size. Their guidance is about erections and recovery. Girth in healthy men has barely been studied, which is why we show our own numbers and how we got them.
Are Penis Pumps Safe?
For most men, yes, when used the right way. Most problems come from too much pressure, or too long without a break.
In studies of men who used a pump with a ring for erection problems, the most common side effects were small red spots or bruising (about 18% of men), discomfort (about 18%) and trouble ejaculating (about 22%). The red spots and bruising were short-lived (AUA guideline). In our Discord, swelling is what new pumpers ask about most. It fades within hours, and it is a sign to use less pressure next time.
The rules our coaches teach
Start under 5 inHg. You should feel full, never pain.
Pump in short sets and let the air out fully between them.
Never go more than 10 minutes without a break.
15 to 20 minutes in total, 2 to 3 sessions a week to start.
If you use a ring for sex, take it off within 30 minutes.
Stop at pain, numbness or a color change.
The FDA's advice to pump makers is the same idea. Use only as much vacuum as you need, because too much "may bruise or injure the penis" (FDA guidance). That is the reason to buy a pump that shows your pressure.
Who Should Ask a Doctor First?
Get medical advice first if you take blood thinners, have a bleeding problem or sickle cell disease, have had erections that would not go down, or have less feeling down there. The same goes for recent surgery in that area. Stop and see a doctor if you see blood in your urine or feel lasting numbness.
A pump is the only way to add girth at home that has real data behind it, and it costs a fraction of a procedure. Here is how it stacks up.
Method
What it adds
How long it lasts
Typical price
Main risks
Penis pump
Girth. Typical +0.28" after a steady year in our app, top 10% +0.79"
Held months after stopping in our app. Not proven in trials
From $299, once
Swelling and red spots if the pressure is too high
Penis extender
Length. +0.5 to +0.9" in studies. No girth
Held for 3 months after stopping in one study
From $379, once
Blisters if fit or tension is wrong
Hyaluronic acid filler
Girth. +0.82 to +0.98" soft, about +0.31" erect at a year
Fades. About 56% left at 18 months
$2,182 worldwide, $6,000 USA, per session
Lumps, filler moving, infection
Silicone implant
Girth. +1.22 to +1.92" soft
As long as it stays in
$12,500 worldwide, $18,000 USA
Removal, erosion, fluid, numbness, length loss
Jelqing
No measured data
Nothing to keep
Free
Bruising, numbness, weaker erections
Pills and creams
No size gain in any trial
Nothing to keep
Varies
Hidden drugs in some pills
Gains for procedures are averages from published studies, mostly soft (flaccid) girth. Prices are typical prices from our database of 1,067 prices in 70 countries. All 16 methods are ranked in our penis enlargement methods guide, and every price is in our cost guide.
Pump vs Extender
They do different jobs. A pump builds girth. An extender builds length. In our app, men who only used an extender had a typical girth change of 0.00 inches. Men who added a pump on top gained a typical +0.12 inches of girth, and 66% of them measured thicker.
Men who used both also measured more length, a typical +0.39 inches against +0.24 for men who only extended. They may simply have trained more, so we do not credit the pump for that.
Our kits pair the extender for length with the pump for girth.
Want both? Wear the extender first and pump after. In our app, men who did both for a year had a typical combined gain of +0.75 inches, and the top 10% gained +1.60 inches or more, length and girth together.
Men who message us after 12 to 16 months of extending and pumping report an average gain of 1.6 inches, length and girth combined, and often more when they stay consistent.
What Makes a Pump Work Better
Any pump can make a vacuum. The ones that get results make it easy to use the right pressure, in a cylinder that fits, often enough.
Over the past few years I have bought more than 50 penis pumps. Most of them were trash.
In one test, I pumped 10 to 20 minutes a day for a month on a basic electric pump. My erections got harder and thicker, and my girlfriend noticed. Did I gain permanent thickness in a month? Probably not. Nobody does. What a month gives you is better erections. Lasting girth takes months.
All those pumps taught me what matters. A cylinder that fits your girth. A gauge, so you know your pressure. Build quality that lasts for years. And a pump small enough to travel with. Those four things are what I built the Epic Pump around.
At the end of the day, consistency beats equipment.
From Baseem's YouTube videos and his posts in our Discord.
What to look for in a pump
A gauge or screen. Never guess your pressure.
A cylinder in your size, with a wider one to grow into.
A soft pad, so the seal is comfortable.
Interval modes that pump and release for you.
An app that logs sessions, so you can see your hours add up.
The Epic Pump comes with the cylinder that fits you, in 7 widths.
Pumps work when you use moderate pressure, in short sets, for months. The Epic Pump shows your pressure on a screen, runs interval sets for you and logs every session. Baseem shows both versions, the Epic Hydro for water or air and the quieter Epic Air.
Epic Hydro First Impressions, Is It Worth It?Baseem on YouTube · 8 min
Live pressure readoutThe screen shows your pressure in inHg or cmHg, so you stay in the range where men gain, and out of the range where they get hurt.
Smart modes10 built-in interval modes that pulse the pressure up and down for you, plus your own presets in the app.
Water or airPick Water + Air (the Epic Hydro) or Air only (the Epic Air), which is a little quieter.
A cylinder that fits7 cylinder widths from 1.5 to 2.87 inches. Size up as you grow, the way our coaches do.
Contenu réservé aux plus de 18 ans
This video shows a penis pump being used on the body.
Baseem runs a real session on the 3 in 1 Pump in air mode. The preset pumps up and releases on its own, which is what interval pumping looks like.
Comparing brands? We compare 13 pumps side by side in our guide to the best penis pumps.
Real Results From Epic Buyers
Photos from Epic buyers, taken weeks or months apart, not right after a session. The previews are blurred. The real photos are graphic, so they open only when you tap.
Epic buyer
+1.4" girth
Graphic photos
Epic buyer
+1.1" girth
Graphic photos
Epic buyer
+0.8" girth
Graphic photos
Epic buyer
+0.7" girth
Graphic photos
These are some of our best individual results, not what most men get. Most of these men pumped and extended for many months. Some buyers were rewarded for sharing their photos. Results vary. See more results.
What Men in Our Discord Report
Pumping is now 1 in every 8 messages in our Discord. In 2023 it was 1 in 70. 16 members shared their own girth numbers over at least 2 months. Their typical gain was +0.48 inches over about 8 months, and 8 of 16 gained half an inch or more. Almost all of them pumped as part of a routine that also included an extender. It is a small group that chose to post, so treat it as a story, not a promise.
Bought this pump as my introduction to PE journey a year ago. ... I gained approximately.5in in girth and length ... 10/10 for customer support and care as well.
3 in 1 Pump review on our store
The Pumps We Build
Every Epic pump shows your pressure, runs interval sets and seals with a soft pad. The kits add an extender for length.
Best for girth
Epic Pump Starter Kit
5.0 from 17 reviews
One-piece electric pump with a live pressure screen, 10 smart interval modes, and water + air or air only.
Every Epic Pump comes with a 180-day money back guarantee.
Do Penis Pumps Work FAQ
Do penis pumps really work?
Yes. A pump gives most men a firm erection within minutes, which is its best-proven use. It also makes you look bigger for a few hours after a session. And men who keep pumping for months build girth. In our app, 82% of men who pumped at least 1.5 days a week for a year measured thicker. Our numbers are self-measured, not a clinical trial.
Do penis pumps actually increase size?
They increase girth, slowly. In our app, men who pumped steadily for a year gained a typical +0.28 inches of girth, and the top 10% gained +0.79 inches or more. The bigger size right after a session is swelling that fades within hours. Pumps do not add real length.
Do penis pumps make you bigger permanently?
Studies have not proven it. Our own data suggests the slow gains can stay. We found 33 men who measured while pumping and again a typical 6 months after they stopped. Their typical girth did not drop, and of the 13 who had gained at least 0.2 inches, 11 kept at least half of it. It is a small group, self-measured, so treat it as a good sign, not proof.
Do penis pumps increase girth?
Yes, for men who stick with it. In our app, 72% of men who logged 50 or more hours of pumping measured thicker than when they started, and 48% gained a quarter inch or more. Read the full guide on how to increase girth.
Do penis pumps increase length?
Not on their own. In a study of men who pumped 20 minutes, 3 times a week, for 6 months, length did not change in a way that counted. For length, an extender is the tool with the studies behind it. Read do penis extenders work.
How long does it take for a penis pump to work?
An erection takes a few minutes. Many men notice firmer erections within a few weeks. Girth you can measure takes months. In our app, steady pumpers had typically added about +0.12 inches by month 3 and +0.20 inches by month 12.
How long does a penis pump keep you hard?
With a constriction ring at the base, the erection holds after you take the cylinder off. Take the ring off within 30 minutes. Without a ring, you stay fuller than normal for a few hours, but the firm erection fades like any other.
Do penis pumps work for erectile dysfunction?
Yes. This is their best-studied use. When the American Urological Association pooled 12 studies, about 76% of men were satisfied with their pump. If you have erection problems, talk to a doctor first, because they can check for causes a pump will not fix.
What is the success rate of penis pumps?
For erections, about 76% of men were satisfied across 12 studies, and single studies ranged from 34% to 100%. For girth, 82% of men in our app who pumped steadily for a year measured thicker.
Is a penis pump better than Viagra?
They are different tools. A pill is easier. A pump is drug-free and works in minutes, and doctors suggest it to men who cannot take ED pills or do not want them. Some men use both, but ask your doctor first.
Do penis pumps work after prostate surgery?
Yes. In three studies, men who pumped daily after prostate surgery kept their length, while men who did not pump lost about 1.6 to 2 cm. Talk to your urologist about when to start.
Are penis pumps safe?
For most men, yes, when used the right way. Start under 5 inHg, pump in short sets with breaks, and stop at pain, numbness or a color change. Most side effects are swelling or red spots from too much pressure, and they pass on their own.
Who should not use a penis pump?
Get medical advice first if you take blood thinners, have a bleeding problem or sickle cell disease, have had erections that would not go down, or have less feeling down there. The same goes for recent surgery in that area.
Do water pumps work better than air pumps?
No. The vacuum does the same job either way. Water is nice in the shower or bath and needs no lube. Air is quicker, quieter and easier to do anywhere. More in do water pumps really work.
Do cheap penis pumps work?
A cheap pump can make a vacuum, so it can fill you up. What most cheap pumps lack is a gauge, so you cannot tell what pressure you are using or repeat a session that worked. That is how men end up with red spots and forced days off.
How often should you use a penis pump?
Start with 2 to 3 sessions a week. In our app, men who pumped 2 to 3.5 days a week had the lowest share who lost girth, 8%. Full steps are in how to use a penis pump.
Do doctors recommend penis pumps?
Yes, for erections and for recovery after prostate surgery. The American Urological Association says men with erection problems should be told about pumps as a treatment option. No urology group recommends a pump for size.
Do penis pumps work for a curved penis?
Europe's urology guideline says doctors can offer vacuum devices together with other treatment, and notes that the data is limited. Our products are not intended to treat any disease, so talk to a urologist first.
Why did my penis pump not work?
The usual reasons are stopping too soon, measuring right after a session, too much pressure, or a cylinder that does not fit. Of 4,845 men who logged a pump session in our app, only 23% were still pumping 3 months later, and girth takes months.
Results vary. This article is general information, not medical advice. Our products are not intended to diagnose, treat, cure, or prevent any disease and have not been evaluated by the FDA. Talk to a doctor if you have erection problems, a health condition, or take medicine.
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