Xylopia, a state of high psychomotor inhibition, refers to the complete suppression or reduction of motor behavior and verbal activity, and the frequent maintenance of a fixed posture. In severe xylophobia, called rigidity, the patient does not speak, does not move, does not eat, has fixed facial expressions, retains urine and stool, and lacks response to stimuli. If left untreated or improperly cared for, it can last for a long time and can have serious consequences and complications. There are several types of rigidity: 1. schizophrenia: such as catatonic rigidity. 2. 2. Mood disorders: such as depressive rigidity. 3, severe stress disorder: such as reactive wood stiffness, often accompanied by blurred consciousness. This state lasts for a short period of time and can be rapidly recovered or transferred to an excited state. After recovery, the experiences during the period of rigor mortis are mostly not recalled. 4.Organic rigidity: common in infection, poisoning, brain tumor, cerebrovascular disease, traumatic brain injury, degenerative brain disease, epilepsy. 5.Drug-induced rigor mortis: pharmacogenic rigor mortis.