Popping of the ankle or feet without any associated ankle or foot pain is usually normal. However, if a tendon is snapping over one of your ankle bones when making quick motions or descending stairs, this may indicate a condition called subluxation or dislocation of the tendons.
Achilles Tendon Injuries – Rupture/Tear
This happens when the tendon that connects your heel bone to your calf muscle tears making its fibers separate.
Peroneal Tendon Injuries
A tendon is a band of tissue that connects a muscle to a bone. The two peroneal tendons in the foot run side by side behind the outer ankle bone.