Generally, lidocaine ointment is applied evenly to the glans 20-30 minutes before sexual intercourse to achieve a delaying effect. Lidocaine ointment is a local anesthetic that has the effect of blocking nerve conduction and can be used for premature ejaculation caused by hypersensitivity of the glans. Patients can take a soy-sized amount of lidocaine ointment, apply it evenly around the glans and coronal groove, and wait for it to penetrate under the mucous membrane of the skin, which can play the role of local anesthesia. Patients need to use it before sex, apply it for 20-30 minutes to reduce the sensitivity of the glans and achieve the delay effect. And then wash it with warm water to start sex, thus prolonging sex time. However, premature ejaculation patients need to pay attention not to rely on lidocaine ointment, it is recommended to promptly visit the male or urology department to find the cause of premature ejaculation, so as to target treatment.