White blisters above the foreskin may be related to genital herpes, glans phimosis, pearly penile papules and other causes. 1. Genital herpes: at the beginning, there are burning and itching symptoms on the foreskin, and then many white blisters can appear. 2. Glandulitis: at the beginning of the disease, edema, congestion and blisters can be seen on the foreskin and glans, and redness and erosion can be seen around the opening of the urethra. 3. Pearly penile papules: mainly manifested as translucent white papules visible to the naked eye, usually not fused together, without itching, oozing and other abnormal manifestations. The above phenomenon may also be caused by other factors, it is recommended that patients go to the regular hospital in a timely manner, to clarify the cause of the disease, under the guidance of the doctor for standardized treatment, so as not to delay the condition.