The heel is the portion of the human body that lies at the back of each foot. Its exterior shape is formed by the bone calcaneus, also known as the heel bone. The heel bone also rests at the very back portion of the foot and is the largest bone in the foot. It is found right beneath the ankle. The rear half of the heel bone is known as the tuber calcanei. It is responsible for the visible projection of the foot that constitutes the heel.

Two muscles of the foot, abductor hallucis and abductor digiti minimi, extend from the heel bone's sides. These muscles move and flex the first great toe and the fifth toe, respectively. The heel bone also contains the beginning portion of the Achilles tendon, which attaches the calf and its muscles to the heel. The placement of the ankle and heel right above and below each other helps shape the area of the foot known as the arch. The arch and heel together allow the foot to evenly distribute any forces exerted on it, especially on ground that is not completely flat.

To treat the tear in the heel, the patient’s blood is taken and with the help of a special equipment, filtered to procure the plasma which is rich in healing cells called platelets. These plasma cells are then injected to the painful area. This is a day care procedure which does not require the patient to be admitted in the hospital in order to administer the injection.