There are many reasons for patients to have foot pain after standing for a long time, as follows: a. Tenosynovitis of the foot and ankle: mostly caused by chronic strain, which appears mainly as local pain, swelling and pressure pain, etc. Some serious patients may also have limited foot activity and functional impairment. Plantar fasciitis: pain in the heel, especially after long periods of standing, this pain is extremely strong and will be reduced or disappear with proper rest or physical therapy such as massage. Third, ankle arthritis: can lead to the patient’s symptoms of prolonged standing foot pain, if the relevant examination, confirmed as a result of this disease, you can use anti-inflammatory and analgesic drugs or heat therapy for medical treatment, can quickly relieve pain. Fourth, flat feet: the patient’s feet standing for a long time pain may also be due to flat feet, because flat feet easily lead to pain in the middle of the foot, especially in the patient after standing for a long time pain is very strong, and may also be accompanied by a decline in walking ability. Fifth, osteophytes: easy to involve the ankle joint, resulting in patients with prolonged standing foot pain symptoms, serious patients may also be accompanied by muscle atrophy around the joint, joint weakness, etc.