The common cause of pain in the back of the ankle tendon is Achilles tendonitis, which can be dealt with in the following ways: 1, stop excessive activity or labor, and avoid prolonged weight-bearing walking and standing. 2, appropriate self-stretching of the Achilles tendon, using the hand or elastic band for the dorsum of the foot to stretch the Achilles tendon, using the dorsum to stretch the Achilles tendon slowly and gently, each time to do it for 15 minutes or so, 3-4 times/day. 3, you can use a hot towel or a hot water bag to apply a hot compress to the back of the ankle. Hot water bag for hot compresses on the back of the neck of the foot, through hot compresses to promote the inflammation to subside. 4, you can take anti-inflammatory, analgesic drugs, such as non-steroidal anti-inflammatory drugs, commonly used are meloxicam, erliximab, celecoxib, etc..