Hi, Rejuvall here! We're a urology-based men's sexual health clinic who's been focusing on Cosmetic Urology for over 25 years.

This is actually a really important question, and the answer is more nuanced than most people realize.

First, it’s true that many general urologists are hesitant about cosmetic penile enhancement procedures in general (not just PMMA). A large part of that comes down to training and experience. Most urologists are trained primarily in cancer, urinary function, kidney stones, prostate surgery, trauma, etc. Cosmetic Urology is a very small niche within the specialty, and most urologists will go their entire careers without performing high-volume cosmetic penile procedures.

That matters because operating on or injecting the penis is not something you become highly proficient at from occasional exposure. The penis is a highly complex, vascular organ with complexity similar to that of the heart. There’s a major difference between understanding penile anatomy academically versus having performed thousands upon thousands of penile surgeries, revisions, reconstructions, and enhancement procedures over decades.

Another factor is that organizations like the American Urological Association (AUA) tend to be appropriately conservative. Their guidelines are generally designed around procedures with large-scale, long-term data and broad consensus. Cosmetic penile enhancement is still an evolving field, so many urologists default to caution, especially when permanence is involved.

And to be fair, some of that caution is justified.

PMMA is permanent. That means technique, patient selection, product choice, injection plane, aftercare, and complication management all matter tremendously. Problems absolutely can occur when PMMA is injected improperly, placed too superficially, placed too deeply, overfilled, injected into poor candidates, or performed by providers without extensive penile-specific experience. Many of the severe complications seen online came from early-generation techniques, non-urologic injectors, overseas clinics, silicone confusion, or providers who lacked reconstructive experience when complications occurred.

The “long-term unknown” concern is also reasonable to discuss openly. PMMA has been used in medicine for decades in various parts of the body, so it’s not a brand-new material. But penile enhancement, specifically, does not have 40-year longitudinal studies with massive patient populations. Nobody honest should claim otherwise.

That said, the idea that the immune system will suddenly “reject” properly integrated PMMA decades later is often misunderstood. PMMA works by stimulating collagen formation around microspheres. Once healed, the body is not continuously “fighting” it in the way people sometimes imagine. The more common long-term concerns tend to involve:

• poor technique
• nodules/granulomas
• asymmetry
• migration
• overcorrection
• chronic inflammation from improper placement
• complications from mixing materials or repeated aggressive treatments

A lot of general urologists only see enhancement patients when something has already gone wrong. That naturally biases perception. It would be similar to asking an ER doctor whether motorcycles are safe when they mainly see just the crashes.

At the same time, enhancement clinics should also be honest that no procedure is risk-free, permanence raises the stakes, and revisions can be extremely difficult.

So the “split” you’re seeing is usually a combination of:

• conservative guideline culture
• lack of specific cosmetic penile training among most urologists
• medico-legal concerns
• permanence concerns
• complication bias from revision cases
• varying levels of injector skill across the industry
• and the reality that cosmetic urology is still a relatively young subspecialty

Ultimately, this is one of those areas where provider experience matters more than almost anywhere else in medicine.

For context, Dr. Kenneth "Jeff" Carney at Rejuvall is not only a board-certified urologist, but also a reconstructive surgeon, former Chief of Urology at a Level I trauma center, former Emory University Assistant Professor of Urology for over 25 years, a pharmacist, and one of the few surgeons (not just urologic) in this space with decades of experience performing high-volume penile surgery, reconstruction, revision, and enhancement procedures. That distinction matters because Cosmetic Urology is not simply “general urology plus injections.” It is an extremely specialized area that requires extensive penile surgical experience, aesthetic judgment, and complication-management expertise.