How hyaluronic acid penile injections (penis filler) work
Neoderma's H.A.P.I. process — Hyaluronic Acid Penile Injections, often called penis filler — places Juvéderm Voluma or RHA filler in the penile shaft through two microcannula entry points, under local anesthesia, in about one to two hours. Girth increases significantly, length moderately, and the result is visible before you leave the office.
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Which filler: Juvéderm Voluma or RHA, and why it works for girth
Our process using dermal fillers has allowed a breakthrough in penile enhancement. The same products which are approved to enhance cheeks and lips are injected into the penile shaft to significantly increase penis girth and moderately increase penis length.
Studies show that penile girth is most desirable in terms of appearance and also intimate relations, and penis enhancement injections have the greatest effect on girth (circumference). That is the whole logic of the approach: put a smooth, long-lasting hyaluronic acid filler exactly where it changes what matters most.
The most popular and long-lasting hyaluronic acid filler for penile enlargement is Juvéderm. Neoderma uses Juvéderm Voluma or RHA, and because the practice performs a very high volume of injectable treatments, it buys and prices these products in bulk — see penile filler cost.
How many syringes does penile filler take?
While typical treatments to the face or lips require 1–3 syringes, penile enlargement with Juvéderm Voluma requires on average between 5 and 15 syringes to the penile shaft.
| Plan | Syringes | Notes |
|---|---|---|
| Base treatment | 5–10 syringes | Of your chosen product (Juvéderm Voluma or RHA) |
| Full effect | 10–20 syringes | What most patients receive, over 1–2 sessions about two weeks apart |
| Same-day add-on | Extra syringes | Can be added on the day of treatment at a significant discount |
The number you need depends on your anatomy and your goals, which is why it is set at the consultation rather than quoted on a website.
The microcannula procedure, step by step
Our enlargement procedure is performed under local anesthesia and takes about one to two hours. Patients can return to normal activity immediately after treatment.
In most cases only two injection sites are used, with a microcannula technique. Microcannulas offer enhanced safety over multiple sharp-needle injections, with less chance of bruising. Your provider layers the filler evenly and massages it smooth, and splitting treatment into two sessions leaves room to refine the result instead of overfilling in a single visit. A natural look and feel is the whole point of the technique, and it's what patients comment on most.
“To my surprise it did not take long for the filling process and did not hurt at all. Less than having Botox.”Patrick S. · Neoderma patient testimonial, June 2023
Scrotal enhancement is available for men who want it, planned alongside the shaft treatment.
What to expect after penile injections
Immediately
You see an immediate result. Expect mild to moderate temporary swelling and possible bruising. A gauze dressing goes on, and you can drive yourself home.
First two weeks
Dressing changed daily for the first week, a simple daily massage routine for about two weeks, and no sexual activity or rigorous exercise during that window. Final results are evident after 1–2 weeks.
Session two (~2 weeks later)
Fullness is added where needed and symmetry fine-tuned, bringing most patients to their 10–20 syringe total.
How long results last
Duration of the results depends on the products used for the treatment. Your provider will discuss maintenance at the consultation.
The full day-by-day picture, including what the injections feel like, is on the penis filler recovery page.
Terms you'll hear
- H.A.P.I.
- Hyaluronic Acid Penile Injections — Neoderma's name for non-surgical penile enhancement with hyaluronic acid dermal filler.
- Juvéderm Voluma
- The hyaluronic acid filler shown in the before-and-after photos. The most popular and long-lasting hyaluronic acid filler for penile enlargement is Juvéderm.
- RHA
- The other hyaluronic acid filler Neoderma offers for this treatment; your provider confirms the product at the consultation.
- Microcannula
- The placement technique: two entry points in most cases instead of multiple sharp-needle injections, with less chance of bruising.
- Syringe
- The unit filler is counted and priced in. Face and lip treatments typically use 1–3; penile enlargement with Juvéderm Voluma uses 5–15 on average.
Penile injections FAQ
What is H.A.P.I.?
H.A.P.I. stands for Hyaluronic Acid Penile Injections — Neoderma's name for non-surgical penile enhancement with hyaluronic acid dermal filler. Juvéderm Voluma or RHA is placed in the penile shaft to significantly increase girth and moderately increase length.
Does it add length, or only girth?
Both, in different measure: the filler significantly increases girth and moderately increases length. Patients have reported gains of more than 50% in girth and 20% in length, and injections have their greatest effect on girth.
Which filler is used?
Juvéderm Voluma or RHA. The most popular and long-lasting hyaluronic acid filler for penile enlargement is Juvéderm, and Voluma is the product shown in our before-and-after photos. Your provider confirms the product and the number of syringes at the consultation.
How many syringes does it take?
While typical treatments to the face or lips use 1–3 syringes, penile enlargement with Juvéderm Voluma requires on average between 5 and 15 syringes to the penile shaft. Base treatment starts with 5–10 syringes, and most patients receive 10–20 syringes for full effect over one or two sessions. Extra syringes can be added the same day at a significant discount.
Is it one session or two?
One or two, spaced about two weeks apart. Base treatment starts with 5–10 syringes in the first session; the second adds fullness where needed and fine-tunes symmetry, bringing most patients to 10–20 syringes in total.
Why a microcannula instead of a needle?
In most cases only two injection sites are used with a microcannula technique. Microcannulas offer enhanced safety over multiple sharp-needle injections, with less chance of bruising.
When will I see the result?
Patients see an immediate result, and final results are evident after one to two weeks once swelling settles.
How long do the results last?
Duration of the results depends on the products used for the treatment, Juvéderm Voluma or RHA. Your provider will discuss what to expect, and maintenance, at your consultation.
Is scrotal enhancement available too?
Yes. Scrotal enhancement is available for men who want it, and it is planned alongside the shaft treatment at your consultation.
Have it explained in person.
A private 30-minute consultation ($50) with Neoderma's enhancement specialists walks through the process, your syringe count and your exact quote — before anything is scheduled.
$50 private consultation, credited toward treatment if you proceed within two weeks · Open Mon–Sat
Keep reading
Before & after photos
Stylized X-ray-style photos of a real patient at two and four weeks, shown after age confirmation.
Penile filler cost
Pricing from $4,625, bulk syringe discounts, the $50 consultation and Cherry financing.
Pain & recovery
What the injections feel like, the first week's dressing, the two-week massage routine and when sex and workouts resume.