Pain on the left side of the waist may be due to the following reasons: first, kidney problems, such as hydronephrosis, kidney tuberculosis, kidney tumors, kidney stones and induced pain on the left side of the waist; second, in the case of women, it may also be due to gynecological inflammation, such as pelvic inflammatory disease, endometritis and other diseases induced by the emergence of implicating pain; third, is due to some problems of the lumbar spine induced The pain on the left side of the lumbar spine may be caused by gynecological inflammation, such as pelvic inflammation and endometritis. In case of pain on the left side of the waist, it is recommended that the patient should not overwork in daily life, pay attention to local warmth, then avoid prolonged standing or sitting, develop a good habit of life, and give appropriate local hot compresses and massage, or acupuncture and massage to relieve.