When people are doing heavy work or lifting heavy objects, if their movements are uncoordinated and their postures are incorrect, acute lumbar sprain will often occur, that is, "waist flashing". This is an acute injury caused by the sudden stretching of soft tissues such as muscles, ligaments and fascia of the waist or sacrum, which exceeds its elastic limit. Acute lumbar sprain can immediately cause severe pain, even a sense of lumbar fracture. At this moment. The waist is afraid to move, it is difficult to walk, and even when lying in bed, it is impossible to turn over. Lumbar pain persists, and coughing, sneezing and abdominal exertion can aggravate the pain. Acute lumbar sprain can be treated as follows: (1) Stop working absolutely and stay in bed. You should lie on your back on a hard bed with a thick quilt and a soft pillow under your waist to relieve pain and muscle spasm. (2) Do not massage with hot compress on the day of sprain, so as to avoid local blood vessel dilatation, oozing blood and aggravating edema. After 24 hours, local treatment can be done by hot compress, massage and cupping. Or cover the affected area with a hot cloth fried with salt, or evenly hit the injured muscles in the back with your fingertips, palm edges or half fists. You can also apply safflower oil, rice wine, etc. Go to the affected area to promote local blood circulation and reconcile qi and blood. Acute injury caused by sudden stretching of muscles, ligaments, fascia and other soft tissues in sacrum beyond its elastic limit. Acute lumbar sprain can immediately cause severe pain, even a sense of lumbar fracture. At this moment. I dare not move my waist, and it is difficult to walk. In severe cases, lying in bed can't even turn over. Lumbar pain persists, and coughing, sneezing and abdominal exertion can aggravate the pain. Acute lumbar sprain can be treated as follows: (1) Stop working absolutely and stay in bed. You should lie on your back on a hard bed with a thick quilt and a soft pillow under your waist to relieve pain and muscle spasm. (2) Do not massage with hot compress on the day of sprain, so as to avoid local blood vessel dilatation, oozing blood and aggravating edema. After 24 hours, local treatment can be done by hot compress, massage and cupping. Or cover the affected area with a hot cloth fried with salt, or evenly hit the injured muscles in the back with your fingertips, palm edges or half fists. You can also apply safflower oil, rice wine, etc. Go to the affected area to promote local blood circulation and reconcile qi and blood. If the pain is severe, you should go to the hospital at once.