Back pain after exercise is commonly caused by the following reasons: first, lactic acid buildup, after excessive exercise will lead to the accumulation of lactic acid in the body, there will be localized soreness and pain, generally by appropriately slowing down the intensity of exercise, while bathing with warm water, and then appropriately drink more warm water, can help relieve pain, if necessary, can also be localized hot compresses or physical therapy to relieve symptoms. It must be ruled out that rhabdomyolysis second, lumbar muscle strain, after improper exercise can lead to muscle damage, need to increase rest, while local Chinese medicine and acupuncture can be done for treatment. Third, the lumbar spine may be damaged, such as the onset of disc herniation, need to go to the hospital in time to check the lumbar spine CT or MRI examination to clarify. At the same time to lie down more, reduce exercise. It is also necessary to consume more vitamin and fiber-rich foods to enhance the local repair ability.