The causes of lateral heel pain include trauma, plantar fasciitis, and fat pad inflammation. 1. Trauma: due to external factors such as fall from height, fall, sprain, car accident, etc., the heel is injured, which triggers the symptoms of pain on the lateral side of the heel. 2. Plantar fasciitis: chronic aseptic inflammation occurs on the soles of the feet due to prolonged standing, upright walking, overwork, etc. Inflammatory factors constantly stimulate and cause pain on the lateral side of the patient’s heel. 3. Fat pad inflammation: the fat pad of the heel pad is the elastic pad of the sole of the foot, which is mainly formed by the fibrous tissue and also contains fat tissue. With the continuous growth of age, the elasticity of the heel pad will gradually decline, causing damage to the heel bone and triggering the symptoms of pain in the lateral side of the heel. If the patient has symptoms of lateral heel pain, it is recommended that the patient go to the hospital in a timely manner to improve the relevant examination, to clarify the cause of the disease, and follow the doctor’s instructions for treatment.