Diabetes can damage nerves, as can surgery on the prostate or lower bowel. Spinal cord damage or disease and even some brain diseases can likewise interfere with this complex function. Diseases or injury affecting the penis . Peyronie's disease and priapism are the diseases most often associated with impotence. Peyronie'ss disease is a condition of unknown cause that scars the penis and bends it.
Priapism is the name for an erection that won'st go away.
It can damage your penis permanently and is sometimes the result of injection treatments for impotence. If you have an erection that persists and hurts, consider it a medical emergency and get help quickly. If you are not satisfied with the quality of your erections, particularly if they used to be better, you should have a medical checkup to look for significant causes. One of the easiest ways to find out if the cause is just emotional is to determine if you have good nighttime erections. Most men will have erections at night as part of their sleep cycle.