The left side of the foot appeared via pain, the most common are the following aspects of the cause: 1, may be caused by trauma, the patient usually have foot sprain or pressure injury, contusion history, in addition to the pain, there will be accompanied by localized swelling, the pain will be aggravated by the activity. 2, may be the left foot of the local chronic aseptic inflammation, usually often standing or often walk, do running, jumping and other strenuous exercise People are prone to, generally the joints of the foot are prone to strain and chronic pain. 3, there may be lumbar spine diseases, such as lumbar disc herniation, lumbar spinal stenosis compression of the nerve root, which leads to the lower limbs of the nerve pulling pain, numbness, weakness. In addition to the nerve pulling pain on the top of the foot, this condition will also be manifested as muscle and nerve pulling pain on the back of the calf or thigh.