Tendon hyperreflexia refers to a condition in which there is a significant increase in the tendon reflexes of the tendons. The classification of such enhancement is judged clinically in the following two ways: first, by comparison of the bilateral limbs. For example, if the tendon reflex is stronger on one side than on the other, the tendon reflex is said to be hyperactive. Second, the tendon reflex is determined by the classification of the tendon reflex. In clinical practice, tendon reflexes are classified into 0-4 levels. Grade 0 means that the tendon reflexes are absent, grade 1 means that they are weak, grade 2 means that they are normal, grade 3 means that they are hyperactive, and grade 4 means that the tendon reflexes are hyperactive and are complicated by clonus. In this case, the determination of normal, diminished and hyperactive is mainly based on the clinical experience of the physician. If a patient has a grade 3-4 tendon reflex, it suggests that the patient has a hyperactive tendon reflex.