The pain in the sole of the left heel may be caused by physiological pain due to prolonged walking or inappropriate shoes, or it may be caused by heel bursitis, plantar metatarsal tendonitis, heel bone spurs, heel bone tumors and other diseases. 1. Physiological pain: If you walk for a long time, or wear shoes that are too small, it can cause physiological pain in the left heel due to extrusion, which can be relieved after resting or replacing suitable shoes. 2. Heel bursitis: refers to acute or chronic inflammation of the bursa, usually manifested as pain in the sole of the heel, localized pressure, redness of the skin, fever and other symptoms. 3. Plantar Tendonitis: It is a sterile inflammation of plantar fascia caused by strain, cold, etc. It usually manifests as stabbing pain in the heel, and may extend to the inner arch of the foot. 4. Heel bone spurs: Bone proliferation in the heel bone due to degeneration can stimulate the local production of sterile inflammation, often manifested as pain at the bottom of the heel, and may even affect walking. 5. Tumor of heel bone: If tumor occurs in the heel bone, it will also cause pain in the bottom of the left heel. Left heel pain may also be caused by other reasons, such as trauma, lumbar intervertebral disc herniation, etc. If the pain persists, it is recommended to consult a doctor for examination, and follow the doctor’s instructions for targeted treatment after clarifying the cause of the disease, so as to avoid delaying the condition.