Hypotonia-paralytic dyskinesia: It involves the head, neck and waist, such as neck weakness, inability to raise the head, waist weakness, inability to straighten up and protrude the abdomen, inability to walk, inability to take steps and lift the legs and feet to drag the ground. This is a clinical manifestation of delayed-onset dyskinesia. Then what are the differential diagnosis of neck weakness and inability to raise the head? The following is to introduce to you. Neck soft can not lift the differential diagnosis 1, pharmacogenetic Parkinson syndrome due to DR is antipsychotic drugs to occupy or block endogenous DA can not be combined with DR, although also serve antipsychotic drugs history, but involuntary movement manifestation of muscle tonus movement reduction and eye movement crisis. 2, Huntington’s disease according to the genetic history of chorea and dementia and other three main signs, and TD is difficult to distinguish, HD patients are also commonly used antipsychotics health search, if there is a sedentary can not or repeat the stereotyped involuntary movement prompted by the concomitant TD. 3, Meige syndrome is a common oral dyskinesia complete type in addition to the oral and mandibular dystonia health search, and also blepharospasm; non-complete type of only the orofacial, In addition to orofacial and mandibular dystonia, there is also blepharospasm; non-complete type has only orofacial, lingual, pharyngeal and mandibular dystonia. 4, torsion spasms manifest rapid, stereotyped repetitive involuntary movements without a history of taking antipsychotics. The occurrence of the phenomenon of soft neck can not raise the head is closely related to the long-term use of antipsychotics, it is recommended that the patient should be reasonable and prudent under the guidance of the doctor, so as to avoid misdiagnosis and suffer unnecessary pain.