When the back of the foot is sprained to the tendon after active treatment, full recovery takes about 2-3 weeks. Treatment requires the following: a. The sprain of the tendon should be diagnosed based on the patient’s clinical symptoms and signs, and a local plain X-ray examination to rule out the possibility of fracture. Because once there is a fracture, the treatment plan is different from a simple tendon sprain. Second, rest must be the main focus, try to avoid walking on the ground with weight, to minimize the local stimulation. Cold compresses should be actively applied just after the injury, and hot compresses should be applied locally 48 hours after the injury, and the affected limb should be elevated in the early stage. Fourth, the local can actively apply topical ointment to activate blood circulation and remove blood stasis, slowly will recover.