Hot compresses have a certain relief effect on back pain caused by inflammation and strain injury, but they are usually ineffective for back pain caused by urological diseases and lumbar tumors. 1. Inflammation, strain, etc.: For lumbar fascia inflammation, lumbar muscle strain or lumbar disc herniation caused by low back pain, the appropriate use of hot compresses can effectively relieve the symptoms of pain. Because hot compresses can make the local temperature rise, thus improving blood circulation in the waist, speed up the body’s metabolism, for the soothing of the nerves also have a certain role, can effectively improve the symptoms of back pain. 2. Urological diseases: If the patient’s back pain is caused by urinary system diseases, such as nephritis, urinary stones, usually use hot compresses, the effect is often not too good. At this time, patients should go to the hospital in time for CT and other tests. After determining the cause of the disease for treatment, in order to make the back pain symptoms can be cured. If the patient is lumbar spine tumor or retroperitoneal tumor, hot compresses have no effect. Surgical resection and chemotherapy and radiotherapy are needed. If the symptoms of lumbar pain exist repeatedly for a long time, the patient must consult a doctor in time for examination and treatment for the primary symptoms.