It is a normal phenomenon for normal men to have 3-5 erections every night. After circumcision, some patients will have painful erections at night. To avoid or reduce the occurrence of such cases, patients need to pay attention to: 1. reduce the contact of sexual stimulation, and it is recommended to temporarily separate from the partner; 2. take oral medications to improve sleep after surgery, such as sedative drugs of the Valium class, to improve sleep and reduce the occurrence of erections at night; 3. when painful erections occur at night, you can get up and walk around, urinate or use cool water to Wipe the glans to promote its weakness.