Itchy blisters on the genitals may be related to genital herpes, glans phimosis, contact dermatitis and other causes. 1. Genital herpes: Herpes simplex virus attack on the genitals can cause herpes in the genital area, accompanied by itching symptoms. 2.Foreskin glans dermatitis: the foreskin of the penis and the head of the penis are infected by pathogens such as Candida albicans and inflammatory reaction occurs, which can cause localized herpes, which can be accompanied by itching. 3. Contact dermatitis: If the genitals come into contact with allergens such as condoms, it can cause the body to undergo an abnormal immune response, resulting in the appearance of pimples or mounds of herpes in the genital area, which can be accompanied by itching. The above symptoms may also be caused by other factors, it is recommended that people with genital blisters with itching go to a regular hospital in time to clarify the cause of the disease, under the guidance of the doctor for standardized treatment, and strive for early recovery.