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Penis filler: does it work & is it safe? Plus, alternatives

8 min read

Written by: 

Amelia Willson

Reviewed by: 

Raagini Yedidi, MD

Published: Jul 02, 2024

Updated:  Mar 26, 2026

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Reviewed By

Raagini Yedidi, MD

Raagini Yedidi, MD, is an internal medicine resident and medical reviewer for Ro.

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Key takeaways

  • Penis filler refers to a cosmetic procedure in which a healthcare provider injects a soft tissue filler (e.g. hyaluronic acid) into the penis to create a thicker-looking penis.

  • Penis fillers may increase girth by 1.5 inches (with some studies showing even greater increases), but they won’t change the length of your penis. 

  • Men often report higher self-esteem and confidence after using penis filler.

  • Side effects usually include mild pain, swelling, redness, and bleeding, although more serious side effects or infection can occur.

  • Penis filler is usually priced by the number of syringes used, with total costs for the procedure ranging from $10,000 to $15,000.

Here's what we'll cover

Here's what we'll cover

Key takeaways

  • Penis filler refers to a cosmetic procedure in which a healthcare provider injects a soft tissue filler (e.g. hyaluronic acid) into the penis to create a thicker-looking penis.

  • Penis fillers may increase girth by 1.5 inches (with some studies showing even greater increases), but they won’t change the length of your penis. 

  • Men often report higher self-esteem and confidence after using penis filler.

  • Side effects usually include mild pain, swelling, redness, and bleeding, although more serious side effects or infection can occur.

  • Penis filler is usually priced by the number of syringes used, with total costs for the procedure ranging from $10,000 to $15,000.

You’ve heard of lip filler? Meet penis filler, a penile girth enhancement procedure that promises a similar effect: making a penis look fuller and plumper. During the procedure, a healthcare provider administers several injections of a soft tissue filler, such as hyaluronic acid, into the shaft of the penis. 

But the question is: Does penis filler actually work? To find the answer, we dove into the research and talked with two plastic surgeons who specialize in the treatment. 

What is penis filler? 

In short, a penis filler is a cosmetic procedure during which a healthcare provider injects a form of dermal filler into the penile shaft to create an instantly thicker, plumper look. 

Healthcare providers typically recommend practicing good hygiene and cleaning the area properly afterward to prevent infection. They may also suggest taking a short (1–2 week) break from sex. 

“Patients who were previous ‘growers’ most often turn into ‘showers’ from the weight of the filler holding the penis in a more out position and reducing retraction,” says David Shafer, MD, a board-certified plastic surgeon and inventor of the SWAG (Shafer Width and Girth) procedure.

It’s important to note that penis filler injections do not make your penis longer in any permanent sense. Rather, they make it look larger, both when flaccid and erect, says Norman M. Rowe, MD, a board-certified plastic surgeon with a practice in New York and New Jersey. 

“It ‘feels’ like it always has, and the look is larger, but natural,” Dr. Rowe explains.  

In addition to increasing the girth of the penis, penis fillers may also help you last longer in bed, according to preliminary research. A small study, for example, found that the procedure helped reduce symptoms of premature ejaculation (PE). That being said the evidence is limited, and larger, high-quality studies are needed to confirm these findings.

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Does penis filler work?  

Yes, studies show that penis filler often adds up to 1.54 inches of girth (usually ~1 inch on average, about one month after the injection). These results can last up to two years, with small reductions in size starting at the 18-month mark. 

Size is just part of the puzzle when it comes to penis filler, according to Dr. Shafer. 

“While we do have patients that are on the smaller end of the spectrum seeking enhancement, many patients are actually average-to-large, but they are looking to boost their size even more to enhance their relationships or boost their confidence,” he says.

Dr. Rowe adds, “Some men do it because they are self-conscious about [their] penis size, while others have related to me [that] they do it to ‘spice things up.”

Benefits of penis filler

Here are some of the other benefits of penis fillers, according to men who had penile girth enhancement:

  • Improved genital self-image

  • Higher self-esteem

  • Increased self-confidence, especially in situations where someone could see their penis, such as in a locker room

  • Increased sexual confidence

  • Increased satisfaction with sexual performance

What does a penis filler procedure entail?

Typically, the penis filler procedure itself only lasts about 30 minutes. Here’s what to expect.

1. You’ll usually be numbed in the groin using local anesthesia. 

2. The provider will perform a series of injections to achieve the look you discussed during your consultation. 

3. You’ll get to see results immediately once the procedure is over, along with some mild bruising and swelling. 

4. Follow your provider’s aftercare tips, which may include a gentle massage and careful hygiene.

5. Avoid sex or masturbation for 1–2 weeks after the procedure to ensure healthy healing.

6. Around 18 months, consider scheduling a touch-up appointment if instructed by your provider and if it’s of interest. 

Penile filler may increase penile girth by up to 1.5 inches at the one-month mark, but the results don’t last forever. According to a follow-up of 230 men, that increase goes down by more than a quarter-inch at six months. Other studies have shown that it decreases by 20%–40% at 18 months, depending on the filler used. In other words, your mileage may vary.

“The fillers generally last two years,” Dr. Rowe says. “Most of my patients start getting touch-ups or refills after 18 months so as not to totally start from scratch.” 

Types of penis filler

There are several types of penis fillers, including:

  • Hyaluronic acid penis fillers

  • Polylactic acid fillers

  • Polymethyl methacrylate fillers

Hyaluronic acid filler

Hyaluronic acid (HA) filler is a gel-like substance that mimics the body’s natural hyaluronic acid. Meaning, it holds onto water and adds volume to the area where it’s injected. 

As a filler, hyaluronic acid is the go-to for penile girth enhancement procedures due to its low risk of complications. 

“Hyaluronic acid-based products such as Juvederm Voluma and Volux have an antidote with hyaluronidase, an enzyme that can ‘melt’ the filler,” Dr. Shafer says. “This is important for aesthetic reasons but also for safety if there is a complication from the filler.”

That means hyaluronic acid penis filler can be dissolved if necessary. So, providers can reverse the filler (i.e. remove it from the body) if there are any complications or the patient simply doesn’t like the result.

In a study of 155 men, those who received multiple hyaluronic acid filler injections had an average girth increase of about 0.71 inches (1.8 cm).

  • Men underwent an average of 2.2 penis filler treatments. So, if you do the math, it comes out to an average girth increase of 0.32 inches (0.82 cm) per session. 

  • Twenty three men had four or more treatments and experienced an average girth increase of about 1.16 inches (2.95 cm).

In a small study of 38 men, hyaluronic acid fillers added 1.34 inches (3.41 cm) in girth when flaccid and 0.52 inches (1.32 cm) when erect, though this decreased over time due to natural resorption. Complication rates were low, and side effects were generally mild and resolved on their own. 

And in another small study of 64 men, a single hyaluronic acid filler treatment increased average penile girth by about 0.9 inches (2.27 cm) at 24 weeks post-injection. It also led to an increase in satisfaction with penile appearance and improvements in post-injection sex life. Plus, there were no serious adverse side effects. 

Polylactic acid filler

Polylactic acid (PLA) filler is a synthetic substance made from powder and thickening agents that’s mixed with sterile saline prior to injection. When injected, it stimulates your body to produce more collagen (a natural protein in your skin, connective tissues, and more) over time. This can gradually increase fullness and firmness in the area of injection. 

However, compared to HA filler, polylactic acid filler tends to produce less of a girth increase in the short term. In a study comparing types of penis filler, polylactic acid fillers added 0.63 inches (1.6 cm) while hyaluronic acid fillers added 0.83 inches (2.1 cm). 

Both treatments led to an increase in penile satisfaction. They were also found to be safe, and no serious side effects were reported with either type of penis filler. 

Polymethyl methacrylate filler

Polymethyl methacrylate (PMMA) filler is a semi-permanent injectable made of tiny plastic microspheres (i.e. microscopic round particles). These microscopic round particles stay in the tissue where they’re injected, supporting the area and providing long-lasting volume. 

In a study comparing HA, PLA, and PMMA fillers for penile augmentation, researchers found that PMMA caused the largest increase in penile girth. Like the other studies on penis fillers, no serious side effects were reported.

However, the men who received PMMA filler were the least satisfied with their results — both in regards to how their penis looked and their sex life. This may be because PMMA filler is:

  • Harder than HLA and PLA, making the penis feel more unnatural

  • More permanent than HLA and PLA, which some men did not prefer

Side effects and risks of penis filler 

The risks associated with penis fillers are generally pretty low when being injected by an experienced, board-certified plastic surgeon. 

Typically, the main side effects you’ll be dealing with after the procedure include “some mild to moderate swelling and occasionally bruising and mild soreness,” according to Dr. Shafer. 

It’s worth noting that the US Food and Drug Administration has not approved any type of injectable for the purpose of penile enhancement. So, penis fillers are an off-label use of dermal fillers. 

That’s why it’s important to have the procedure done by a qualified, licensed professional who specializes in penile girth enhancement — and never by someone at a less-than-trusted facility or on your own, which is when serious complications can happen.

Having said that, there are some potential caveats to be aware of with a penis filler procedure.

Pain, swelling, and bruising

Generally, penis filler procedures are safe with transient, manageable side effects. 

The most common of these are pain, bruising, and swelling. In one study, nearly 80% of men reported bruising or swelling the day after the procedure, but these improved on their own within a week.

In another study, only 4.3% of individuals reported complications, including subcutaneous (under-the-skin) bleeding, nodules, or infection. It’s best to contact your provider if you notice any symptoms like these in the days following your procedure. They can recommend self-care steps you can do at home, or let you know if you need to come in.

For example, small nodules or bumps can usually be treated through massage for several days, but larger ones may need to be surgically removed. Symptoms of infection include sudden warmth, swelling, and redness in the penis. Infection from the filler may develop even one or two months after the procedure.

Contour issues

After the procedure, you may end up with some unexpected lumps and bumps along the shaft. This can happen if the filler is injected too quickly for it to disperse evenly. 

In one study, just over 2% of men reported this issue. 

“Some contour issues are not uncommon as the filler is settling and are addressed during the follow-up visit,” Dr. Shafer says.

Maintenance treatments

Similar to other cosmetic procedures, penis filler is often not a one-and-done process, according to Dr. Shafer. And while penis fillers can add up to about an inch of girth to your penis, that can decrease by more than a quarter-inch at the six-month mark. 

Don’t worry; even though the girth gradually decreases over time, people still report high satisfaction with the treatment even at the 12- and 18-month marks. 

People who get hyaluronic acid fillers like Voluma and Volux tend to start needing maintenance treatments around two years. But it can be smart to schedule a maintenance treatment at 18 months. 

Costs of penis filler

The average cost of penis fillers ranges from $10,000 to upwards of $15,000, depending on the type of filler and the number of syringes used. Providers typically price the procedure by syringe. And hyaluronic acid fillers tend to be more affordable.

“I generally tell patients that if they are going to do the procedure, one or two syringes is not going to make a difference,” Dr. Rowe says. “Multiple syringes need to be used.” 

Initial procedure

Usually $10,000–$15,000+, depending on the type of filler and number of syringes

Maintenance treatments

Depends on the number of syringes used

Alternatives to penis filler: what to try first or next?

Penis fillers are just one type of penis enlargement treatment or technique. Other alternatives people try include:

Some folks might also try jelqing, but the practice isn't backed by scientific evidence.

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Bottom line

Penis filler can increase girth and confidence, with noticeable results right away. But the results require maintenance at least every few years, and the procedure can be costly. If you’re considering penis fillers, here’s what you need to know.

  • Penis fillers may add up to about an inch of girth on average, but some of the effects gradually diminish over 18–24 months.

  • Hyaluronic acid is the most commonly used and affordable synthetic option.

  • Mild side effects like swelling, bruising, uneven contours, or temporary lumps are common and transient. Serious side effects like infection are also possible, which is why maintaining hygiene after the procedure is so important.

  • Most men need multiple syringes for meaningful results and should expect to budget several thousand dollars per procedure.

  • Alternative penis enlargement techniques include penis pumps, penis implants, and penile extenders.

Frequently asked questions (FAQs)

DISCLAIMER

If you have any medical questions or concerns, please talk to your healthcare provider. The articles on Health Guide are underpinned by peer-reviewed research and information drawn from medical societies and governmental agencies. However, they are not a substitute for professional medical advice, diagnosis, or treatment.

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