Sudden back pain is recommended to stop and rest immediately, identify the cause of the disease and then choose physical therapy, medication, surgery and other treatment modalities, if the symptoms persist, it is recommended to consult a doctor in a timely manner. The causes of sudden back pain include lumbar muscle sprain, trauma, lumbar dorsal fasciitis, lumbar intervertebral disc herniation, etc. It is recommended to find out the cause of the disease before treatment, and target treatment. 1. Lumbar muscle sprain: if it is acute lumbar muscle sprain, you can ice within 72h, then brake, 72h after the local hot packs, if there is a muscle rupture also need to carry out surgical treatment. 2. Trauma: the lumbar region is subjected to external impact, which can easily cause lumbar muscle, soft tissue injury, or even fracture, trauma should be promptly to the hospital for debridement, and serious soft tissue damage should also be treated with surgery. 3. Lumbar dorsal myofasciitis: If you have a history of lumbar dorsal myofasciitis, and the cold stimulation can cause lumbar pain, you can apply appropriate hot compresses, red light therapy and other physical therapy to promote local blood circulation and relieve pain, and you can also take anti-inflammatory drugs such as ibuprofen under the guidance of a doctor to relieve pain. 4. Lumbar disc herniation: Lumbar disc herniation may be induced by poor posture and other triggers of pain, lumbar disc herniation can be lumbar spine traction, herniation of serious need for surgical resection of the herniated part of the intervertebral disc. Causes of sudden back pain is more, may also be related to lumbar small joint disorder, lumbar spondylolysis, ankylosing spondylitis and other diseases, if the persistence of no relief, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor targeted treatment.