This condition is seen in about three diseases: i. Glansitis caused by fungus. II. Complications of diabetes. Three, syphilis in venereal disease. The mechanism of fungal infection and diabetic comorbidity is similar, because after causing local infection of the glans, the surface of the glans is edematous, and after the edematous tension reaches a certain level, chafing is formed, and the wound has burning pain, and the wound is surrounded by edema. The syphilis spirochete invades the body and gathers on the surface of the glans, eventually forming an ulcerated fissure, which will slowly expand and eventually form a round crater-like ulcer with a hard texture around the ulcer, medically known as a hard chancre. The first thing you need to do is to go to a regular hospital to get the relevant tests, so that you can confirm the diagnosis and give the correct treatment plan.