PD in men typically refers to Peyronie’s disease, a condition where scar tissue forms inside the penis, causing it to curve, shorten, or change shape during erections. It affects somewhere between 0.4% and 9% of men depending on the population studied, though the true number is likely higher because many men never bring it up with a doctor. The condition is not rare, it’s not cancer, and it has well-established treatment options.
What Happens Inside the Penis
The penis contains two chambers of spongy tissue that fill with blood during an erection. Each chamber is wrapped in a flexible sheath called the tunica albuginea, which stretches evenly to allow a straight erection. In Peyronie’s disease, an injury to this sheath triggers a healing response that produces a flat piece of scar tissue, often called a plaque. Because this plaque doesn’t stretch the way healthy tissue does, the penis bends toward the scarred area when erect.
The initial injury can come from sex, sports, or any incident that bends or hits the penis. Sometimes it’s a single event; sometimes it’s repeated minor stress over time. In some men, an overactive immune response attacks cells in the penis and creates inflammation that leads to the same scarring, which may explain why the condition sometimes appears without any memorable injury. Men with autoimmune conditions or connective tissue disorders (like Dupuytren’s contracture, which causes thickening in the palm of the hand) appear more prone to developing it.
Who Gets Peyronie’s Disease
Peyronie’s disease becomes more common with age. A large survey of over 4,400 men in Germany found an incidence of 1.5% in men aged 30 to 39, rising to 6.5% in men over 70. Rates also vary by region: studies in the United States report prevalence between 0.4% and 3.2%, while an Italian study found rates as high as 7.1%. Japanese studies have reported lower rates, around 0.6%. Much of this variation comes down to how willing men are to report symptoms and how actively researchers screen for them.
The Two Phases of the Disease
Peyronie’s disease moves through two distinct stages, and knowing which one you’re in matters for treatment decisions.
Acute Phase
This is the active, changing stage. It generally lasts 6 to 12 months, though it can stretch to 18 months. During this time, erections are often painful (and sometimes the penis hurts even when soft). The curvature may worsen, the penis may shorten, or new deformities like an hourglass shape may develop. Because the scar tissue is still forming, the situation is in flux.
Chronic Phase
Once the curvature and shape have stayed the same for 3 to 6 months with no further changes, the disease is considered stable. Pain typically fades. The curvature, length changes, and any deformities remain as they are unless treated. Most surgical and injection-based treatments are only recommended once you’ve reached this stable phase.
What It Looks and Feels Like
The most common presentation is a curve that bends upward or to one side during erection. Curves can also bend downward or involve a twist. In published studies, the average curvature at the time men seek treatment is about 48 degrees, with a range of 10 to 90 degrees. Some men develop an indentation or narrowing (the hourglass shape) rather than a clean curve.
Beyond the visible changes, many men notice that erections feel less rigid, particularly on the side of the plaque. The combination of curvature and reduced firmness can make penetration difficult or impossible depending on severity. Some men also notice a palpable lump or hard spot along the shaft when the penis is soft.
The Emotional Toll
Peyronie’s disease carries a psychological burden that’s easy to underestimate. Roughly 48% of men with the condition meet criteria for depression, with about a quarter experiencing moderate symptoms and a fifth experiencing severe symptoms. Around 81% report emotional difficulties related to the disease, and over half say it has negatively affected their relationship. In clinical trials, more than 80% of participants reported significant distress, with about a third describing that distress as severe.
These numbers make sense when you consider what the condition actually disrupts. It changes something deeply personal, often without warning, and many men feel too embarrassed to talk about it with partners or doctors. That isolation compounds the problem. Addressing the psychological side is just as important as treating the physical symptoms.
Non-Surgical Treatment Options
During the acute phase, the main goals are managing pain and trying to limit how much the curvature progresses. Once the disease stabilizes, more active treatments become options.
Injection therapy is one of the most studied approaches. A specific enzyme that breaks down the collagen in scar tissue can be injected directly into the plaque. It’s typically used for men with stable disease whose curvature falls between 30 and 90 degrees and who can still achieve erections (with or without medication). However, the evidence on how much curvature these injections actually correct is mixed. A large meta-analysis of over 500 patients found that combination injection therapy did not produce a statistically significant improvement in curvature on its own, which has led many specialists to pair injections with other approaches like traction or modeling.
Penile traction therapy uses a device worn on the penis to gently stretch the scar tissue over time. Older protocols required wearing the device three to eight hours a day for up to six months, which was impractical for most men. Newer devices have shown benefits with just 30 to 90 minutes of daily use over three months, making it a more realistic option. Traction is sometimes used alone and sometimes alongside injections.
When Surgery Makes Sense
Surgery is reserved for men with stable disease who haven’t responded to other treatments or whose curvature is severe enough to prevent sexual function. The approach depends on the degree of curve and erectile quality.
For curves of 60 degrees or less with no hourglass narrowing or instability, a plication procedure is typically recommended. This involves placing stitches on the longer side of the penis to straighten it. It’s simpler, carries less risk, and preserves erectile function well, but it does shorten the penis slightly.
For more severe deformities, curves greater than 60 degrees, or cases with an hourglass shape or hinge effect that destabilizes the erection, a grafting procedure is the better option. The surgeon cuts into or removes part of the plaque and patches the area with graft tissue, which can correct more dramatic curvature while preserving length. The key requirement for grafting is strong erectile function beforehand, because the procedure itself can sometimes affect rigidity.
For men who have both significant curvature and erectile dysfunction that doesn’t respond to medication, a penile implant can address both problems at once, straightening the penis while restoring the ability to achieve an erection.
What Recovery and Outcomes Look Like
With plication, recovery is relatively quick and most men return to sexual activity within four to six weeks. Grafting involves a longer healing period, and some men need several months before erections feel fully normal. Regardless of the approach, the goal is a functional, straight (or near-straight) penis that allows comfortable sex.
There is no agreed-upon minimum curvature that requires treatment. Some men with a 20-degree curve find it bothersome; others with a 40-degree curve function fine. The decision to treat is based on how much the condition interferes with sexual function, comfort, and quality of life.