Back pain in sleep is mainly caused by the following reasons: 1. It is due to incorrect posture during sleep, for example, the patient sleeps for a long time to keep lying flat, the back muscles are compressed for too long, resulting in poor local qi and blood flow, which induces back pain in patients. 2. It may also be due to long sleep time and hard sleeping bed, which induces back pain. 3. It may be due to stimulation by wind and cold during sleep, which leads to aseptic inflammation of the deep fascia of the back. 4. Back muscle contracture, which induces back pain in patients. After the occurrence of back pain, the patient can apply local heat, as well as local massage or herbal fumigation to relieve the pain.