The most telling sign of Peyronie’s disease is a new curve in your penis that wasn’t there before, often accompanied by a hard lump you can feel just under the skin. About 4 in 100 men between ages 40 and 70 develop the condition, though it can occasionally appear in men as young as their 30s. If you’ve noticed a bend developing over weeks or months, along with any combination of pain, shortening, or a change in shape during erections, Peyronie’s disease is a likely explanation.
The Key Signs to Look For
Peyronie’s disease produces a handful of distinct physical changes, and most men notice more than one:
- A palpable lump or band of hard tissue. This is the hallmark finding. Scar tissue (called plaque) forms inside the penis and can be felt through the skin as a flat, firm lump or a ridge of hardened tissue. The area directly over the plaque often feels tender to the touch.
- A new curve during erections. The penis may bend upward, downward, or to one side. An upward (dorsal) curve is the most common pattern, occurring in roughly two-thirds of cases. The scar tissue doesn’t stretch the way healthy tissue does, so the side with the plaque stays short while the opposite side expands normally, pulling the penis into a curve.
- Shortening. Many men notice the erect penis is shorter than it used to be.
- Shape changes. Some men develop narrowing, indentation, or an hourglass-like pinch around the shaft where the plaque sits.
- Pain. Penile pain, particularly during erections, is common early on. It can also occur when the penis is soft.
Not every man experiences all of these. Some notice the curve first, others feel the lump, and some start with pain before any visible change appears. The combination of a new curve plus a palpable hard spot is the strongest self-indicator.
How It Progresses Over Time
Peyronie’s disease moves through two distinct phases, and recognizing which phase you’re in matters because treatment options differ between them.
The first phase, often called the acute or active phase, typically lasts 6 to 18 months. During this window, the curvature may be getting worse (this happens in roughly 21% to 48% of men), staying the same, or occasionally improving on its own. Pain is most common during this phase. The good news is that pain usually improves or resolves entirely within the first 12 months.
The second phase is the stable or chronic phase. Pain has typically faded by this point, and the curvature has stopped changing for at least three to six months. The plaque itself becomes more organized and firm. Other deformities like hourglass narrowing, hinge effects (where the penis buckles at the plaque site), and shortening tend to become more apparent during this phase. Curvature that has stabilized is unlikely to resolve on its own.
How It Differs From a Lifelong Curve
Some men have always had a slight curve to their penis. This is congenital penile curvature, a developmental variation that becomes noticeable during puberty. It’s a completely different condition from Peyronie’s disease and doesn’t involve scar tissue.
The distinction is straightforward: if your penis has always curved in the same direction since your teenage years, that’s almost certainly congenital. If the curve is new and developed in adulthood, particularly after age 40, Peyronie’s is far more likely. There’s also a directional pattern. Congenital curves tend to point downward (ventral), while Peyronie’s curves most commonly point upward (dorsal). Congenital curvature also lacks the palpable hard plaque that defines Peyronie’s.
When Curvature Becomes a Problem
Not all curvature requires treatment. Clinicians use degree of bend as a rough guide to functional impact. A curve of 20 degrees or less is considered essentially normal. Around 30 degrees, most men can still have comfortable intercourse. At 60 degrees or more, penetration typically becomes difficult or impossible, and surgery may eventually be necessary.
Many men with Peyronie’s disease also develop erectile difficulties. The plaque can interfere with blood flow into the penis, and the psychological stress of a changing body doesn’t help. Among men who already have erectile dysfunction, the rate of Peyronie’s disease is roughly twice the general population, around 8%.
What Raises Your Risk
Peyronie’s disease is fundamentally a scarring disorder. The plaque forms when the tough outer layer of the erectile chambers heals abnormally after minor, often unnoticed injuries during sex or physical activity. Some men’s bodies are simply more prone to this kind of excessive scarring response.
Several health conditions increase the likelihood. Diabetes is one of the strongest associations. Men with diabetes have a 7% higher incidence, and those with poorly controlled blood sugar (reflected by higher long-term glucose markers) face even greater odds, roughly 1.6 times the risk. High blood pressure, obesity, abnormal cholesterol levels, and smoking are all linked to higher rates as well. There appears to be a genetic component too, as the condition sometimes runs in families. Men with connective tissue disorders that cause scarring elsewhere in the body, such as thickening in the palm of the hand, are also at elevated risk.
How a Doctor Confirms It
A urologist can usually diagnose Peyronie’s disease with a medical history and a physical exam. The doctor will feel along the shaft for areas of hardened tissue and ask about when symptoms started, whether the curve is changing, and whether you’re experiencing pain or erectile problems. These details help determine whether the disease is still in its active phase or has stabilized.
In many cases, that’s enough for a diagnosis. When more detail is needed, ultrasound is the most common imaging tool. It allows the doctor to measure the plaque in three dimensions, check whether calcium has built up inside the scar tissue, and map exactly where the plaque sits. If erectile function is also a concern, the ultrasound can be combined with a blood flow assessment to evaluate how well blood enters and stays in the penis during an erection.
Checking Yourself at Home
You can do a basic self-check that gives you useful information before seeing a doctor. During an erection, gently feel along the shaft for any hard, flat lumps or a band of firm tissue under the skin. Note where the curve points, how severe it looks, and whether there’s any pain. If you’re comfortable doing so, taking a photo from a consistent angle over several weeks helps track whether the curvature is progressing or stable. This information is exactly what a urologist will want to know at your first visit.
Researchers have also developed a self-assessment app that uses a phone’s camera to measure curvature and lets users mark plaque locations on a 3D model of the penis, all without storing personal photos. Tools like this can help you document changes and communicate more precisely with a healthcare provider, but they don’t replace an in-person evaluation.
One useful detail: men with Peyronie’s disease tend to overestimate how severe their curvature is compared to what objective measurement shows. If the bend looks alarming to you, the actual degree may be less extreme than you think.