The exact cause of Peyronie’s isn’t apparent. Many doctors and researchers believe that it has to do with a recurring injury to your penis. The injury provokes your penis to generate scar tissue, but it builds up haphazardly.
During a normal erection, the elastic tissues in your penis expand as blood fills your vessels. With Peyronie’s disease, the portion of your penis that has excess and erratic concentrations of scar tissue won’t stretch properly and your penis curves or bends abnormally.
For a small segment of Peyronie’s disease sufferers, injury and scar tissue aren’t the cause. For these men, there’s often evidence of high cholesterol, diabetes, or another underlying condition that contributes to artery obstruction.