Back pain symptoms after swimming, mostly related to insufficient warm-up before swimming, improper swimming posture, or the water temperature is too cold, lumbar muscle strain and other factors: a. Swimming-related factors: 1, insufficient warm-up: adequate warm-up before swimming can help improve the flexibility of joints and ligaments to prevent muscle and ligament damage, and insufficient warm-up is easy to cause muscle damage caused by lumbar pain; 2, improper swimming posture: incorrect swimming posture or too violent Easy to strain muscles and ligaments. If you swim for a long time in the wrong position, it can lead to abnormal accumulation of carbon dioxide and lactic acid in the lumbar muscles, making the back pain more obvious. This kind of situation is especially seen in those who exercise less; 3, the water temperature is too cold: the water temperature is too cold can cause muscle spasm in the lumbar region, manifested as pain in the lumbar region after stopping swimming. Second, lumbar spine disease: mainly including lumbar muscle strain, lumbar disc herniation, lumbar small joint disorders, ankylosing spondylitis and other conditions, can be manifested as back pain after swimming. The condition should be treated according to the cause, and the symptoms of posterior lumbar pain will disappear after the original disease is cured. If the symptoms of posterior lumbar pain are not obvious after swimming, you can rest for a while. If the pain is serious, you can take oral non-steroidal anti-inflammatory drugs, such as ibuprofen, under the guidance of a doctor for pain relief, as well as take local physical therapy, such as hot compresses, massage, etc., can relieve pain.