A man’s lower body mostly refers to the male reproductive organs, so blisters on the lower body of men are mostly considered to be related to genital herpes, herpes zoster, eczema and so on. 1. genital herpes: this disease is caused by herpes simplex virus (HSV) infection caused by sexually transmitted diseases, HSV invasion of the human body will be replicated in the cells of the skin, thus causing local inflammation or necrosis, the patient mostly have local blisters, itchy or painful skin and other manifestations. 2. Herpes zoster: this disease is caused by varicella zoster virus infection caused by acute herpetic dermatosis, mostly by the immune system during the attack, blisters are distributed in bands, blisters in the genital area, usually accompanied by significant pain. 3. eczema: for not pay attention to personal hygiene, change the new underwear can not tolerate or live in a humid environment for men, local if there is a symmetrical distribution of pimples, blisters, vesicles and other polymorphic lesions accompanied by obvious itching of the skin, it is necessary to be vigilant about the occurrence of eczema. For men with blisters on the lower body, it is recommended that they go to the dermatology department of the regular hospital, after clarifying the cause of the disease, under the guidance of the doctor active treatment.