Causes of medial ankle pain include ankle impingement syndrome, ankle ligament injuries, and excessive exercise. 1. Ankle impingement syndrome: it refers to the disease of pain caused by various reasons, such as bone encumbrance, etc., between the tissues in or around the joint, where extrusion, friction, impact, etc., occur. For example, anterior internal impingement syndrome of the ankle joint: (1) Bony impingement: commonly caused by various traumatic injuries, such as ankle inversion injuries, ankle sprains, and old external ankle instability. (2) Soft tissue impingement: such as the medial joint capsule and ligament granulation tissue or scar formation after ankle sprain. (2) Ankle ligament injury: such as medial collateral ligament and lower tibiofibular ligament injury, which is commonly injured under the violent action of external rotation of the foot. The injury will cause severe pain on the inner side of the ankle. 3. Excessive exercise: such as playing shuttlecock or running for too long, resulting in overstretching of the medial ankle tendon and injury, which can also cause pain on the medial side of the ankle. If the above symptoms are serious or accompanied by other symptoms, it is recommended to go to the hospital in time to identify the cause of the disease and under the guidance of the doctor for regular treatment.