Left lower back swelling elbow swelling, the possible causes are overstrain, osteoporosis, cervical or lumbar spine disease. 1. Excessive strain: If the usual labor for heavy physical work, or high intensity sports activities such as badminton, tennis, etc., due to muscle fatigue, lactic acid buildup and other factors, there may be a soreness and swelling of the force parts, generally do not worry too much, after resting, the symptoms can be relieved. 2. Osteoporosis: Insufficient calcium intake, insufficient exercise, and drinking a lot of coffee and strong tea may lead to insufficient calcium content in the body, which may lead to osteoporosis, and osteoporosis may occur in the lumbar and back, soreness of the limbs, pain, and pain and soreness are not fixed, and may be accompanied by weakness in the limbs. 3. Cervical or lumbar spine disease: when the nucleus pulposus of lumbar disc or cervical disc herniation presses on the nerves in the back of the neck, the soreness and swelling in the back of the lumbar spine may occur, and may be radiated to the limbs and other parts of the body, with swelling and numbness and other symptoms. There are many reasons for the left lower back swelling elbow swelling, it is recommended to go to the regular hospital in time to identify the causes and timely treatment.