Left side back pain needs to be treated according to the cause, and common causes include kidney stones, lumbar muscle strain, lumbar disc herniation and so on. Commonly used treatments include general treatment, medication, surgery and so on. 1. Kidney stones: Stones in the kidneys can cause low back pain, hematuria and other symptoms. Small stones can be removed by drinking more water or medication, such as potassium sodium citrate, acetylcysteine, etc.; renal colic can be taken orally diclofenac sodium, indomethacin, pethidine and other antispasmodic pain relief. Extracorporeal shock wave lithotripsy, percutaneous nephrolithotripsy lithotripsy lithotripsy is used for those who are ineffective in drug lithotripsy. 2. Lumbar muscle strain: due to the lumbar muscles, fascia, ligaments and other soft tissue injuries resulting in left-sided lumbar pain, activity limitation. Treatment includes correcting bad posture, strengthening the exercise of low back muscles, oral diclofenac sodium, indomethacin and other anti-inflammatory pain, if necessary, can choose to lidocaine, trimethoprim closed treatment, the effect is good. 3. Lumbar disc herniation: the herniated lumbar disc compresses the sciatic nerve and cauda equina, which may cause lumbago, sciatica and cauda equina syndrome. Treatment includes bed rest, pelvic traction; electric grilling, acupuncture, massage; oral diclofenac sodium, ibuprofen and other non-steroidal anti-inflammatory drugs. Microsurgical lumbar disc removal may be considered if conservative treatment fails. There may be other causes of left-sided back pain, if the pain symptoms continue to be unrelieved, it is recommended to consult a doctor in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy. The above medications should be used under the guidance of a doctor.