Young, Gifted, and Black: This is a hard swelling that suddenly appears on the shaft of the penis after sex or masturbation. You need to see a physician to work out what is causing any red spots you are experiencing.
Peyronie's disease Peyronie's disease is an uncommon condition that causes a thickened area or hard lump plaque in the shaft of the penis. A painful blister or sore on your penis could be caused by herpes , which is an STI caused by the herpes simplex virus. Molluscum contagiosum Molluscum contagiosum is a viral skin infection.
Penis rash I have had this bad rash on my penis for about a year. The information provided through TheBody should not be used for diagnosing or treating a health problem or a disease.