If the inner side of the left foot appears to be hot, generally should be considered to be the symptoms caused by nerve abnormalities. This situation can be caused by peripheral neuritis, such as local infection or diabetes-induced peripheral neuropathy, you can do a test to clarify the cause of the disease, and then targeted treatment. If it is caused by infection, you need to choose the appropriate drugs to regulate anti-infection, if it is caused by diabetes, you can apply hypoglycemic drugs and nutritive nerve drugs, such as methylcobalamin. This situation may also be caused by lumbar disc herniation, which can compress the sciatic nerve and radiate to the foot causing sensory abnormalities. In this case, you can generally improve the symptoms through lumbar physical therapy traction, but also oral Danlu Tongdu capsule and other drugs.