Severe back pain after a fall may be due to lumbar spine fracture or lumbar soft tissue injury after a fall, which should be consulted immediately. 1. Lumbar spine fracture: after a fall, due to external force, lumbar spine bone cortex rupture bone compression, compression fracture of lumbar vertebrae can occur, resulting in the emergence of lumbar severe pain. At this time, you should avoid getting up and send to the doctor with professional assistance. 2. Lumbar soft tissue injury: when falling, due to the violent contraction of the lumbar muscles, pulling, can lead to lumbar muscle fiber tears, local congestion and edema, and accompanied by severe pain. You can rest in bed after clarifying the injury, and you can apply cold compresses and other treatments to the injured area to relieve the pain. After a fall with severe back pain, you should seek medical attention as soon as possible to clarify the diagnosis.