The left side of the waist hurts when pressed for the following common reasons: First, lumbar muscle strain: older patients are prone to strain in the lumbar muscles, which induces painful symptoms when pressing the left side of the waist. Patients will have a soreness and swelling of the lumbar region and restricted movement of the lumbar spine, bed rest can make clinical symptoms relieved. Secondly, lumbar sprain: the process of strenuous exercise, sudden twisting of the waist, can occur lumbar muscle sprain, the patient will have the left side of the lumbar pressure pain symptoms, accompanied by lumbar spine activity restrictions, lumbar muscles will also have obvious stiffness. Bed rest and local braking, together with oral administration of Hu Li San capsule and Cao Wu Jia Su tablets, can bring significant relief to the lumbar pain symptoms. Pressure pain in the left lumbar region should be diagnosed and treated early to enable clinical symptoms to be improved. Patients should usually strengthen the lumbar muscle exercise to avoid producing the above conditions.