The Reported Rates
Most clinic pages on this procedure have no complication section at all. Here is what the published data shows.
In the 301-patient comparison, local adverse events occurred in:
| Material | Adverse events | Patients affected |
|---|
| Hyaluronic acid | 7.2% | 9 of 125 |
| Poly-lactic acid | 11.9% | 16 of 134 |
| PMMA | 14.3% | 6 of 42 |
Most were mild — commonly nodules and contour deformities — and no serious or systemic adverse events were recorded. Broader reviews describe adverse events across this field as mild and transient, resolving without intervention.
An important caveat
The SMSNA notes that adverse events in penile enhancement are likely underreported, because most published data comes from single-surgeon, retrospective, single-centre case series with limited follow-up and minimal standardised assessment.
The 7 to 14% figure is the best evidence available. It is probably not the ceiling.
What Can Actually Go Wrong
- Nodules and contour irregularity — the most common complication. Usually related to injection technique, placement plane, or over-filling.
- Asymmetry — uneven distribution of product.
- Swelling, bruising and oedema — expected in the first week rather than a complication.
- Inflammation, pain and itching — reported across all materials.
- Product migration — filler moving from the intended plane.
- Infection — uncommon with sterile technique, but consequential in this tissue.
- Vascular complication — rare but serious. Filler entering a vessel can compromise blood supply and tissue.
The Materials That Cause Serious Harm
Almost all catastrophic outcomes in this field trace to unapproved substances rather than regulated fillers.
The SMSNA strongly recommends against permanent fillers using paraffin and silicone, citing necrosis, progressive pain and swelling, and long-term deformity requiring complex surgical removal and grafting. Liquid silicone injected into genital tissue has produced disfigurement that surgery cannot fully correct.
The AUA separately considers subcutaneous fat injection for girth to be a procedure that has not been shown to be safe or efficacious.
This is why you must know exactly what is being injected. Ask for a product name. Decline anything unnamed, and decline any provider unwilling to explain the difference between a reversible and a permanent material.
The Regulatory Position
There are no FDA-approved products or devices specifically indicated for penile girth enhancement. Every filler used for this purpose is off-label, including ours. The AUA has stated that no technique for girth enhancement has undergone rigorous, prospective, long-term study.
The SMSNA has gone further, recommending the FDA re-evaluate these treatments as de novo therapies rather than allowing approval by equivalence, given the distinct anatomical site and reported complications.
None of that makes the procedure unreasonable. It does mean any clinic presenting it as FDA-approved is misinforming you.
Who Should Not Have This
- Active genital infection or skin condition
- Peyronie's disease
- Bleeding disorders, or anticoagulation that cannot be safely managed
- Unrealistic expectations about what girth enhancement achieves
- Uncontrolled psychological conditions — the SMSNA states augmentation is not appropriate here, and recommends structured screening for body dysmorphic disorder before any procedure
That last point deserves more attention than it usually gets. See when enhancement is not the answer.
How Risk Is Reduced
Choose a physician who understands the vascular anatomy. Use a regulated, named, ideally reversible product. Place it in the correct tissue plane — published technique uses a blunt cannula between the dartos and Buck's fascia, not a needle along the shaft. Keep hyaluronidase available. Stage larger volumes rather than forcing them. Follow the aftercare, particularly the abstinence period.
At Modern Aesthetica, Dr. Daniel Moghadam performs these injections personally. See treatment options for what we offer.
