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 twitch-like movements, repeatedly raising the hands or jumping on both legs. What are the symptoms that are easily confused with this disease? 1, pharmacogenic Parkinson’s syndrome Because the DR is occupied or blocked by antipsychotic drugs, endogenous DA can not be combined with the DR, although there is also a history of taking antipsychotic drugs, but involuntary movement manifested muscle ankylosis, reduced movement and kinetic eye crisis. 2, Huntington’s disease according to the genetic history, chorea and dementia and other three main signs, and TD is not difficult to distinguish, HD patients are also commonly used antipsychotic drugs, if the presence of sedentary inability or repetitive stereotyped involuntary movements suggest the complication of TD. 3, Meige syndrome is a common oral movement disorder, complete type in addition to the mouth, jaw muscle dystonia, but also blepharospasm; incomplete type only orofacial, tongue, pharynx and The incomplete type has only orofacial, lingual, pharyngeal, and mandibular dystonia, or only primary blepharospasm; no history of antipsychotic medication. 4. torsional spasms: rapid, repetitive involuntary movements without a history of antipsychotic medication. The first priority is to avoid risk factors. Clinicians should adhere to the following principles: only patients who do require the application of antipsychotics (e.g., schizophrenia) should be given them. Antipsychotics should never be used to treat neurosis or depression, much less as a sleeping pill to treat insomnia. This is because the onset of delayed movement disorder is not related to the size of the drug dose, and can occur even in small amounts. If delayed-onset dyskinesia occurs in a patient with schizophrenia, it should be weighed against the severity of the problem and should not be discontinued hastily.