The penile tether is the prepuce tether, and blisters on the prepuce tether may be related to contact dermatitis, genital herpes, and glans dermatitis. 1. contact dermatitis: may be a poor quality condom, penis contact stimulation of the prepuce ligament, blisters or erythematous papules, usually conscious itching or burning pain. 2. Genital herpes: herpes virus infects the genital area, genital herpes starts with a red rash, which rapidly produces small blisters on the basis of the red rash. Blisters may appear at the penile ligament. 3. glansitis: the patient is infected with bacteria or mold and other pathogens, such as candida and trichomonas. Caused by the skin barrier is broken, appeared in the glans skin mucous membrane edema, erythema and so on can also spread to the foreskin tie. In severe cases, localized oozing and even blistering can occur. When blisters appear on the prepuce tie, it is recommended to consult a doctor in time, follow the doctor’s instructions for further examination, clarify the cause with the help of the doctor, and actively cooperate with the treatment.