The left upper lumbar pain, consider lumbar muscle strain, lumbar sprain, lumbar intervertebral disc herniation, urinary stones and so on. 1. Lumbar muscle strain: if you sit and stand for a long time or often bend over to do hard work, it is easy to cause chronic strain of the lumbar muscles, pain in the lumbar region, limited activities, aggravated by exertion, and can be alleviated after rest. 2. Lumbar sprain: suddenly change from one position to another, may cause lumbar muscle sprain or lumbar spine small joints disorders lumbar pain, lumbar fixed in a particular position dare not move, through recuperation can be relieved. 3. Lumbar disc herniation: because of the nucleus pulposus prolapse, degeneration and compression of the nerves, in addition to lumbar pain will be accompanied by leg pain and leg numbness, through bed rest, lumbar traction, acupuncture and physiotherapy can be relieved. In severe cases, minimally invasive surgery is needed to remove the herniated disc. 4. Urinary stones: is due to stone stimulation of mucous membrane and cause pain, mostly colicky, part of the radiation to the abdomen, may also be accompanied by urinary frequency, urinary urgency, hematuria and other urinary symptoms, through ultrasound and other tests can be clear. There are many reasons for the pain in the upper left waist, if the rest does not get better, it is recommended to go to the hospital for examination and treatment under the guidance of the doctor.