The causes of sudden foot pain are as follows: First, foot trauma, such as foot stretching, pulling or impact caused by bone and joint injuries, fractures, trauma and sudden pain in the foot. Second, from the internal medicine point of view, it is usually gout and caused by sudden foot pain, usually the first toe joint and heel pain is particularly significant, accompanied by redness of the skin, the surrounding redness, swelling, heat, pain and dysfunction of clinical symptoms. Third, in peripheral neuritis can also be sudden foot pain, especially in patients with a history of diabetes. Fourth, in the foot infection, because the foot is susceptible to bacterial infection, especially fungal infection, may also appear in the foot suddenly very painful clinical symptoms.