Thigh muscle soreness after climbing is caused by acute strain on the thigh muscles and excessive lactic acid accumulation in the thigh muscles. What should I do after the soreness? You can get relief through the following ways: 1, adequate rest, adequate rest is very important to avoid re-injury. 2, self-physiotherapy, mainly heat therapy, hot water bags or hot towels for thigh muscle heat, 15 minutes each time, 3-4 times a day, through hot compresses to promote local capillary dilation, rapid elimination of lactic acid accumulation. 3, local stretching or massage of the thigh muscle, through stretching, massage to relax the muscle. 4, appropriate oral anti-inflammatory and analgesic. 4, appropriate oral anti-inflammatory analgesics or muscle relaxants, commonly used anti-inflammatory analgesics such as diclofenac sodium, celecoxib, etc., commonly used muscle relaxants such as ethylparisone hydrochloride tablets, clozoxazone, etc.