A back flash is often referred to clinically as an acute back injury. When the small intervertebral joints or lumbosacral joints are injured it may compress the nerves and cause radiating pain in the buttocks and legs. It may also cause pain in the lumbosacral region, buttocks, and thigh roots when muscles such as the erector spinae are injured. Commonly used treatments include general treatment, medication, and surgery. 1. General treatment: stopping activities and resting in bed in time after a lumbar flash can help relieve symptoms and avoid aggravation of the condition. Cold compresses within 72 hours and hot compresses after 72 hours can help reduce pain symptoms. 2. Medication: The use of non-steroidal anti-inflammatory drugs such as ibuprofen or antipyretic and analgesic drugs such as acetaminophen can help to improve symptoms and reduce pain. 3. Surgical treatment: When there is a fracture of the lumbar intervertebral joints or lumbosacral joints, surgical treatment such as vertebroplasty, incision and internal fixation, etc., may be needed depending on the condition of the patient. If there is a lumbar flash buttock pain leg pain, it is recommended that the patient seek timely medical treatment under the guidance of the doctor.