There are more causes of left heel pain, such as plantar fasciitis, heel fat pad atrophy, Achilles tendonitis, heel trauma and fracture. 1. Plantar Fasciitis: Left plantar fasciitis can present with symptoms such as walking or standing heel stabbing pain, morning pain in the heel, and swelling of the heel. Generally, it can be relieved after rest, physical therapy or medication. MRI of the foot can assist in the diagnosis. 2. Heel fat pad atrophy: When the left heel fat pad atrophies, the heel loses its cushioning, resulting in active heel pain, which can be relieved after rest, and can be diagnosed by MRI of the foot. 3. Achilles tendonitis: when the left Achilles tendon after trauma, chronic strain injury caused by aseptic inflammation of the Achilles tendon, can be manifested in the left heel pain, usually after resting the symptoms are relieved. 4. Traumatic fracture of the heel bone: Traumatic fracture of the left heel can be stimulated by the fracture to appear left hind foot active heel pain. Generally, X-ray of the foot can clarify whether there is a fracture or not, so as to carry out specialized treatment for the fracture. Therefore, when left heel pain occurs, in addition to the above reasons, it may also be related to prolonged walking, cold and so on, if it can not be relieved on its own, it is recommended to go to the hospital in a timely manner, to clarify the cause of the pain, and to carry out appropriate treatment.