Elevated blood uric acid may cause low back pain, but low back pain may also be seen in conditions such as degenerative spondylitis and lumbar strain. Uric acid is the end product of purine metabolism, mainly produced by the cellular metabolic breakdown of nucleic acids and other purine-like compounds, as well as purines in food by the action of enzymes. The saturation concentration of uric acid in the body at 37℃ is about 420µmol/L. Above this concentration, urate forms crystals and deposits in a variety of tissues, including kidney and synovial membrane of joints, causing tissue damage. 1. Elevated blood uric acid: patients with high blood uric acid and long-term uncontrolled will lead to kidney diseases such as kidney stones, gouty nephropathy, etc. These kidney diseases may cause back pain, hematuria, proteinuria, nocturia and other symptoms. 2. Degenerative spondylitis: Degenerative spondylitis is a kind of osteoarthritic lesion that occurs in middle-aged and old people, and the common symptoms are morning lumbar pain, lumbar pain after weight-bearing, and lumbar stiffness and soreness. 3. Lumbar muscle strain: lumbar muscle strain is a chronic inflammation of the lumbar muscles and their attachment points of the periosteum or fascia, the patient may experience lumbar pain, and aggravated by exertion and other discomforts. Lumbar pain may also be caused by other reasons, it is recommended that the patient to the relevant departments of the regular hospital in a timely manner, in accordance with the doctor’s instructions standardized diagnosis and treatment.