What it is
Scar tissue that stops the penis expanding evenly
The erection chambers of the penis are wrapped in a tough, elastic sheath called the tunica albuginea. In Peyronie's disease, an area of this sheath heals abnormally after minor, often unnoticed, strain or injury and forms a firm patch of fibrous scar tissue, known as a plaque.
The plaque does not stretch like healthy tissue. During an erection the rest of the penis expands normally while the plaque holds one side back, so the penis bends towards it. Depending on where the plaque sits and how extensive it is, the result may be an upward, downward or sideways curve, a loss of length, or a narrowing.
Many men feel embarrassed or anxious about these changes, and it is common for the condition to affect confidence and relationships. You are not alone, and there are well-established ways to help.