Sudden heel pain consider gout, Achilles tendonitis, Achilles tendon rupture and other causes. 1. Gout: sudden joint redness, swelling and pain, mostly caused by eating too much purine food. Laboratory test uric acid is obviously elevated, oral uric acid-lowering drugs, such as febuxostat or allopurinol, etc., the pain can be relieved. 2. Achilles tendonitis: pain in the back of the heel, mostly caused by strenuous exercise or long-term labor, walking more pain will be obvious. Diclofenac diethylamine cream can be used externally, can also be localized hot compresses and other treatments. 3. Achilles tendon rupture: most of them have a history of sprains, can’t walk on tiptoe, can’t straighten the ankle, need to do MRI to make a clear diagnosis. In serious cases, Achilles tendon repair surgery is needed. There are many reasons for sudden heel pain, it is best to go to the hospital to check the cause of the disease, under the guidance of the doctor for the cause of further treatment.