The red spots on the glans are a manifestation of glansitis, often for four reasons. The first is that circumcision and circumcision are not clean, which can lead to the accumulation of foreskin scale, breeding bacteria that cause glans infection and red spots on the glans. The second, usually do not pay attention to perineal hygiene, not daily cleaning and timely change of underwear, will also lead to glansitis. The third, unclean sex life caused glansitis. The fourth, glans skin allergy, resulting in glans on the red spot. It is recommended that you pay attention to hygiene, turn the foreskin over and wash it daily and keep it dry, change your underwear regularly. The local area can be cleaned with potassium permanganate solution, plus erythromycin ointment is applied. If you are allergic, you can take anti-allergy medication, such as paracetamol. If the red spot on the glans recurs repeatedly with the foreskin is too long, you can consider surgery, if necessary, to go to the hospital to check and find the specific cause.