Swelling and pain in the ankle for no reason may be due to muscle strain, trauma and fracture. 1. Muscle strain: If the patient’s long-term ankle activity is large, it may lead to the relevant parts of the strain, and then show symptoms of swelling and pain, at this time the patient should pay attention to rest, so as to alleviate the symptoms of swelling and pain. 2. Trauma: If the patient’s ankle has been traumatized, it may lead to related tissue damage, which may cause swelling and pain. At this time, the patient can massage, massage and other ways of treatment, so as to promote blood circulation, slow down the swelling and pain. 3. Fracture: If the patient has a fracture, there may be small bone fragments after the fracture, and the activity will make the relevant tissues friction damage, thus leading to swelling and pain. If a fracture occurs, the patient should go to the hospital in time for treatment. The symptoms of ankle swelling and pain for no reason may also be due to arthritis and other reasons, the patient should go to the hospital in time for examination and related treatment.