There are three main reasons why the ankle has been a little painful after the sprain: 1. It may be due to a fracture of the bone of the ankle joint, such as a relatively small avulsion fracture. In the case of premature activity or without adequate external fixation of the cast, it may cause the small fracture break to not heal well enough, so that you will feel pain all the time after the injury, even if it is longer there will be local inflammatory lesions at the location of the fracture break, and a little pain. It is best to go to the hospital for an ankle radiograph to see if the fracture has not healed.2. It is due to a strain in the soft tissues around the ankle joint, without adequate braking, rest and premature activity. This will cause the injury to not heal sufficiently, resulting in the ligaments around the joint becoming loose and forming a sterile inflammatory lesion; and the normal joint stability of the entire joint is affected, so it is easy to have a little pain. 3, is due to the formation of inflammatory lesions around the sprain, the inflammation in the process of absorption leads to soft tissue adhesions around the ankle joint, it is easy to have pain. The pain can be easily felt especially when activities are carried out and the adhesions are stimulated.