Male genital blisters can be treated by topical application of lidocaine hydrochloride ointment. Male genital blisters are caused by genital herpes, which is caused by herpes virus infection and can be transmitted mostly through sexual intercourse. When you have genital herpes, you also need to take oral antiviral medications, such as the common acyclovir, famciclovir, and valacyclovir, etc. You can wash locally with saline and keep it relatively hygienic and dry. If genital blisters break out and cause infection, they can be treated with erythromycin ointment, or lidocaine hydrochloride ointment if no infection is present. During the treatment period, sex is absolutely forbidden. If after a week there is still no effect, it is recommended to go to the hospital for examination of the secretions and then follow the doctor’s instructions for treatment.