Benzocaine is a surface anesthetic that is applied to the surface of the glans to effectively reduce its sensitivity for the purpose of treating premature ejaculation and prolonging sexual intercourse. Benzocaine has the characteristics of strong penetration and fast onset of action, which can prolong the time for about 10 minutes in general, but it is also related to individual physique and influenced by a variety of factors. If the premature ejaculation is not caused by high penile sensitivity, the effect is less satisfactory after applying benzocaine. In addition, people who are allergic to benzocaine should not use it to avoid serious allergic reactions, and it should not be used when there is skin breakage on the glans surface. In addition, it should also be noted that people with normal sexual function should not use it for a long time, because benzocaine contains components that inhibit nerve excitement, which will reduce local sensation and may cause impotence in serious cases. In short, people with sexual dysfunction are advised to seek medical attention to identify the cause and use benzocaine under the guidance of a doctor.