Herpes on the glans may be caused by overstimulation, post bacterial fungal infection, herpes simplex virus infection and other factors. 1. Overstimulation: for example, frequent masturbation and excessive friction on the glans area may cause tension blisters to appear on the glans area, which is similar to herpes, accompanied by mild pain. 2. Bacterial and then fungal infections: men have a long foreskin, do not pay attention to the lower body hygiene, may induce circumcision glansitis, due to inflammatory substances stimulation, it will make the glans appear herpes, accompanied by itching, redness, pain and other symptoms. 3. Herpes simplex virus: can induce genital herpes, belongs to a sexually transmitted disease, can make the glans appear herpes, accompanied by tingling, after the rupture of vesicles, oozing, and is highly infectious. The presence of herpes on the glans with obvious discomfort suggests medical examination and treatment to avoid adverse effects.