The possible causes of heel strike include muscle strain, hyperreflexia, and Achilles tendonitis. 1. Muscle fatigue: If there is intense exercise, such as running, long-distance hiking, mountain climbing and other strenuous activities of the lower limbs, there is excessive muscle fatigue, muscle lactic acid buildup, and so on, so that the symptoms of the heel lifting always can not help shaking may occur. 2. Hyperreflexia: the possible causes of hyperreflexia include central neuron injury, cone beam injury, hyperparathyroidism, herniated intervertebral discs compressing the nerves, etc., which may cause pathologic hyperreflexia in the lower limbs, leading to the symptom of shaking when lifting the heel. 3. Achilles tendonitis: If you often jump, run, squatting, you may make the Achilles tendon and the triceps tendon at the back of the calf inflammatory stimulation, so when you lift your heel, due to the force of pulling, can not help but shake the situation. If you can’t stop shaking when you lift your heel, we recommend that you go to a regular hospital in time to find out the cause and get active treatment.