Protruding bones on the medial side of the ankle may be related to the following causes: 1. Normal bony prominence. On the medial side of the ankle, the most obvious bony protrusion is the tip of the medial ankle with the navicular tuberosity below it anteriorly. If the ankle joint has ankle valgus or if the patient has flat feet, abnormal bony protrusions may be seen on the medial side of the ankle joint. 3. caused by old injuries, such as old fractures or dislocations of the ankle joint, then after its recovery, it may leave local deformities or cause 4. The ankle joint has an occupying disease, such as osteochondroma at the distal end of the ankle joint, which may result in a bony protrusion.