In daily life, people often use the word “psycho” when joking or calling people names. In fact, what people want to express in their minds is often the meaning of “mental illness”. Many people think that neurosis and mental illness are the same thing. In fact, there is a big difference between the two. Psychosis is a disease caused by various factors that cause serious disorders of the brain’s higher neural activity, often manifesting as abnormal cognition, emotion, will and behavior, such as speech confusion, excitement and agitation, hitting and destroying things, silence, sensitivity and suspicion, irritability, crying and laughing, etc.; unable to study, work and live normally; actions and behaviors are difficult to be understood by the general public, appearing eccentric and different; under the domination of pathological psychology In addition, they may have suicidal or aggressive behaviors or behaviors that hurt others; they have varying degrees of self-knowledge deficits, lose judgment about their psychiatric symptoms, believe that their psychology and behavior are normal, and refuse treatment. There are currently two major categories of psychosis: one is functional psychosis, where there is no organic lesion in the brain and no abnormal findings in various tests. The cause is not well understood, but strong mental stimulation or excessive grief can trigger the disease. Among these, schizophrenia is the most common. Another type of psychosis is organic psychosis, i.e., psychiatric symptoms caused by organic lesions of the brain. Psychosis should be treated in a psychiatric hospital or a psychiatric department of a general hospital. Early treatment is good for neuropathy, which refers to organic diseases of the nervous system and often manifests clinically as disorders of sensation, movement and reflexes, such as disorders of consciousness, aphasia, paralysis, convulsions, numbness, pain, and urinary and fecal disorders. Depending on the location and function of the nerves, the nervous system can be divided into the central nervous system and the peripheral nervous system. According to the object innervated by the nerves, the nervous system can be divided into somatic and visceral nerves. For example, hemiplegia is mostly injury at the vertebral tract of the brain, poliomyelitis is damage to the gray matter of the spinal cord, peripheral neuritis is inflammation of peripheral nerves, etc. Common neurological diseases include cerebrovascular diseases, infectious diseases of the central nervous system, spinal cord diseases, extrapyramidal diseases, and epilepsy. In addition, nutritional deficiency diseases and diseases of the vegetative nervous system are also included. Neurological diseases generally have structural changes in the neural tissue. The main clinical manifestations are neurological impairment, such as coma, paralysis, convulsions, pain, unstable movements, tremors, aphasia, and hyperalgesia or loss of sensation. If neurological lesions are found, the patient should be seen in the neurology department of a general hospital. Therefore, psychosis and neuropathy are both different and related. Some psychiatric disorders have neurological symptoms in addition to psychiatric symptoms. Some neuropathies, especially when the lesion involves the brain, have neurological symptoms as well as psychiatric symptoms.