Heel pain can be caused by a number of different causes. Most commonly, heel pain on the bottom is caused by a chronic injury to a tissue on the bottom of the arch called the plantar fascia. This condition is commonly called plantar fasciitis, and is often mistakenly known as a heel spur (which may be present on the bottom but is not a source of pain). Other causes of heel pain on the bottom include nerve entrapment or disease, swelling of a bursal pad, bruises, body-wide arthritic diseases, stress fractures of the heel bone, and rare tumors. Pain on the back of the heel can be caused by bone spurs, Achilles tendon disease, or growth plate inflammation in children.