Problems with the penis can cause pain and affect a man's sexual function and fertility.
Penis disorders include
Erectile dysfunction - inability to get or keep an
erection
Priapism - a painful erection that does not go away
Peyronie's disease - bending of the penis during an erection due to a hard lump
called a plaque
Balanitis - inflammation of the skin covering the head of the penis, most often in
men and boys who have not been circumcised
Penile cancer - a rare form of cancer, highly curable when caught early