Usually, the pain on both sides of the heel may be caused by tendonitis, traumatic arthritis, heel bone deformity and other reasons. 1. Tendonitis: prolonged weight-bearing walking and strenuous exercise can cause aseptic inflammation of the local tendons on both sides of the heel, which leads to obvious pain symptoms and aggravation when pressed. 2. Traumatic arthritis: when both sides of the heel are subjected to external violence, it can cause damage to the articular cartilage and lead to traumatic arthritis. In the process of walking activities, due to the stimulation of inflammation, there will be obvious pain symptoms on both sides of the heel. 3. Heel deformity: congenital developmental abnormality on both sides of the heel, or trauma caused by heel bone fracture, without active reset, can lead to heel deformity, thus causing pain on both sides of the heel. For patients with serious deformity, they need to consult a doctor and undergo surgery. In addition, pain on both sides of the heel can also be seen in other diseases, it is recommended that patients go to the hospital in time to avoid delay.