Men with red spots on the glans are asymptomatic and can disappear on their own after a period of time. Most of the corresponding conditions are not accompanied by obvious organic lesions, and the main causes include hygiene deviation, allergic reaction, friction stimulation and other reasons. 1. Hygiene deviation: often do not change underwear, especially the circumcision of men, the foreskin scale repeated stimulation will cause related symptoms, after washing can be improved. 2. Allergic reaction: allergic reaction to clothing or toiletries, there will be related symptoms after use, allergic reaction is not obvious can disappear on its own. 3. Friction stimulation: too much coitus, after the end of coitus will also have related symptoms, and local congestion is related. The appearance of red spots on the glans, accompanied by obvious mucosal ulceration pain, need to consult a doctor in time to observe, after diagnosis of the condition in the clinician’s guidance for standardized treatment, to avoid delaying the condition.