Benzocaine can be harmful to men when used for a long time, which may lead to angioneurotic edema or contact dermatitis, and seriously may lead to impotence or premature ejaculation, so it is important to use it correctly under the guidance of a doctor, to avoid damage to the body caused by long-term use. Benzocaine is a surface anesthetic, with the role of pain and itching, can act on the nerve tissue of the skin and mucous membrane, blocking the conduction of nerve impulses, can be used for trauma anesthesia, ulcer anesthesia, etc., but also play a role in reducing the sensitivity of the glans to prolong the ejaculation time. However, long-term use may lead to a serious reduction or increase in glans sensitivity, which may lead to impotence or premature ejaculation in severe cases. The use of benzocaine may occur angioneurotic edema or contact dermatitis, may also appear skin tingling, rash and other symptoms, may also lead to the emergence of methemoglobinemia, generally not recommended for long-term use. Allergic to the product is prohibited. The drug should be used in accordance with the dosage under the guidance of a doctor to avoid unauthorized use and damage to the body.