Muscle tone is the basis for maintaining various body postures and normal movements, and patients with lower limb hypertonia often have lower limb spastic paraplegia, gait abnormalities, and decreased muscle strength. 1. lower limb spastic paraplegia: spastic paraplegia is a degenerative disease of the nervous system, which can only be improved by moderate activity and persistent exercise, and there is no special treatment; 2. gait abnormalities: patients with lower limb hypertonia will have a scissor gait, with a marked increase in extensor muscle tone and scissor-like crossed legs; 3. Gait, extensor muscle tone is increased significantly, the lower extremity inward excessive when moving, the legs crossed in a scissors; 3, muscle strength decline: lower extremity hypertonia patients will be combined with muscle strength decline; 4, tonic state: lower extremity hypertonia patients, muscle tone like leadpipe, gear-like tonic, muscle tone is obviously hyper-tensioned, and persist, similar to convulsions, is often a manifestation of severe hypertonia; 5, lower extremity tendon reflexes: lower extremity hypertonia patients will have lower extremity tendon reflexes Patients with high tendon reflexes will have active or hyperactive tendon reflexes of the lower limbs; 6. Pathological signs are mostly positive: patients with pathological signs are generally positive, such as Babinski’s sign, Chakotow’s sign, Oppenheim’s sign, etc. Patients who have dystonia of the lower limbs may have neurological lesions, even accumulating to the lateral cord of the spinal cord. Therefore, once the manifestation of hypertonia in the lower limbs occurs, it is necessary to seek medical attention for examination and treatment.