Sexual dysfunction exists in many manifestations related to sexual desire, erection, and ejaculation. Clinically, the most common erectile dysfunction is the inability to have an erection. Erections may be persistent at the same time, and there are several reasons for persistent erections: 1. Disease reasons: rare blood disorders can cause persistent erections; 2. Medical reasons: such as penile cavernography and related examinations, which belong to the medical reasons leading to persistent erections that can’t be retracted in a short period of time; 3. Pharmaceutical reasons: such as blind use of drugs that cause sexual arousal to improve drugs, including Western medicines, herbs, and pCms, leading to Persistent erection; 4, related to physiology: morning erection, middle of the night erection, as long as it does not affect the sleep need not be dealt with. A small number of patients once the erection affects sleep, which has a certain impact on life and body.