The main causes of Achilles tendon pain include aseptic inflammation and Achilles tendon rupture. 1. Aseptic inflammation: It mainly includes aseptic inflammation such as Achilles tendonitis, Achilles tendon bursitis or tendinitis, which is mainly caused by abnormalities in the foot structure such as high arched foot, Achilles inversion, Achilles bone protruding, large amount of sports training, and prolonged wear and tear, which results in congestion, oedema, exudation and calcification of Achilles tendon, resulting in Achilles tendon pain. 2. Achilles tendon rupture: It includes Achilles tendon rupture caused by direct or indirect violence injury to the Achilles tendon area. Direct violence is generally traumatic rupture of the Achilles tendon, such as injuries from sharp objects, heavy objects, etc., which can cause direct injury or even rupture of the Achilles tendon; indirect violence injury generally refers to the Achilles tendon is in a state of tension when the sudden force, exceeding the range of tension that can be withstood by the Achilles tendon, resulting in rupture of the Achilles tendon. There may be other reasons for Achilles tendon pain, so it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.