Paralysis is the diminution or loss of random motor function and is a common symptom of the nervous system. Paralysis is the result of lesions of the upper and lower motor neurons, the pyramidal tract and peripheral nerves and is mainly classified as congenital or acquired paralysis. Patients with paralysis are often treated with relief by forced body positions to prevent muscle atrophy in paralyzed patients. The passive position used varies clinically for different causes of paralysis. There are several reasons for the use of forced position in paralysis: 1. Congenital paralysis: refers to central motor disorders caused by non-progressive brain injury or abnormal brain development from various causes before to one month after birth, which can seriously lead to congenital paralysis in the affected child. 2, brain diseases: cranial trauma, tumor, inflammation, cerebrovascular disease, degeneration, poisoning, etc. may cause the symptoms of paralysis in patients, which will be in passive position to avoid the increase of intracranial pressure in patients. 3, other diseases: diabetes, hematoporphyria, macrocytic anemia and vitamin B12 deficiency may also cause paralysis, and different passive positions will be used clinically according to the different paralysis conditions.