Delayed dyskinesia is divided into the following types according to the site of dyskinesia ① abnormal eye muscle movement: blinking, blepharospasm, etc.; ② abnormal facial muscle movement: facial muscle twitching, jerking and sad face, etc.; ③ abnormal mouth muscle movement: pouting, smacking, chewing, suction and lateral jaw movement, etc.; ④ abnormal tongue muscle movement: tongue extension, tongue contraction, wriggling and lip licking, etc.; ⑤ abnormal pharyngeal muscle movement: abnormal palate movement affecting pronunciation and (6) abnormal neck movement: slanting neck, backward neck, etc.; (7) abnormal trunk movement: uncoordinated trunk movement, odd posture, such as shrugging shoulders and retracting back, corkscrew, twisting spasm, diaphragm spasm producing grunting and breathing difficulties, sometimes the whole body swaying from side to side, repeated trunk flexion and extension, back and forth twisting, called body shaking sign; (8) abnormal limb movement: continuous flexion and extension of the distal limbs, called playing piano fingers (toes) sign. The proximal end is rarely involved, and a few of them show dance-like finger paddling movements, throwing movements, hand and foot squirming-like movements, repeatedly raising the hands or jumping on both legs, etc. What are the prevention methods of delayed dyskinesia? 1, the focus of this disease is on prevention, taking antipsychotic drugs should be clear indications. Gradually discontinue the medication for a few months or 1 to 2 years after the movement disorder gradually alleviate subside. The need to continue treatment can be replaced with drugs with fewer side effects in the extrapyramidal system, such as clozapine, risperidone, olanzapine, quetiapine, etc. 2.Medication There is no effective drug for the treatment of TD. Clonazepam is effective in treating some patients with delayed dyskinesia. 3.Antihistamines such as isoprostanes may be effective. 4.Acute dystonia or acute sedentary inability, diazepam can quickly control the symptoms. 5, pay attention to rest, work and rest, orderly life, maintain an optimistic, positive, upbeat attitude towards life is of great help in the prevention of disease. 6, food should be easy to digest and absorb, nutritious, to choose high protein food, to eat more vegetables and fruits. The occurrence of this disease is closely related to the long-term use of antipsychotic drugs, should be used reasonably and carefully under the guidance of a doctor. Small amounts or short courses of medication are of some significance in preventing TD, avoid combining more than 2 kinds of antipsychotics as far as possible, and gradually reduce the dosage when discontinuing or replacing antipsychotics, and do not stop them abruptly; those who are old and frail or with organic brain lesions should be given the minimum dosage, and anticholinergics should not be used or used sparingly when not necessary.