Sitting for a long time lumbar pain may be caused by lumbar muscle tension, lumbar muscle strain, can be treated through activities, hot compresses, medication and other methods. 1. Activity: sitting too long waist pain can be active lumbar muscles, stand up and walk around, relax the muscles, relieve lumbar pain, sitting can put a soft cushion in the waist, reduce the lumbar force. 2. Hot compresses: you can apply hot compresses to the waist, such as the use of hot towels, to promote lumbar blood circulation, relieve the symptoms of lumbar pain. 3 medication: If the symptoms of low back pain are serious and cannot be relieved by activities and hot compresses, you can use non-steroidal anti-inflammatory drugs under the guidance of a doctor, such as diclofenac sodium extended-release tablets. It is recommended to avoid prolonged sitting, back pain can go to the hospital to do a checkup, under the guidance of the doctor treatment.