Between the heel bone and fat pad there is a small sack of fluid called a bursa. This can become inflamed causing heel pain.
Calcaneal Bursitis Symptoms
Symptoms include pain under the heel when walking or running. The area may appear red when compared to the other foot but this is not always easy to see. The heel will be tender to touch and there may be increased warmth over the area.
Bursas are usually found between a tendon and a bone or where padding or shock absorption are needed. If a bursa becomes inflamed through over use, this is called bursitis.
The solution is rest. Padding with a hole for the bursa to fit in can be made. If this injury goes on for a long time some Doctors might give a steroid injection.