2. Mental illness: With the change of social structure and lifestyle, the influence of psychological and social factors on people is increasing day by day. Not only are cerebrovascular diseases obviously increasing, but the incidence of mental illness is also increasing day by day. However, people's understanding of the seriousness of these health-threatening diseases is far behind the changes of the diseases. Mental health and mental health are synonyms. People's spiritual activities include three important aspects: cognition, emotion and will. The cognitive process is from the simplest sensory perception to the complex intelligence and thinking function. Emotional process is people's attitude towards things, such as joy, anger, sadness, joy and comprehensive emotional expression. Will-action activity refers to the conscious action taken to achieve the set goals in daily life, work and social activities. When the above three basic activities are always in a state of coordination and unity, people can maintain good psychological function, which is normal psychological activity. Spiritual activity is a highly coordinated, complete and unified performance. If any aspect of cognitive, emotional and will behavior process is abnormal or uncoordinated, it will definitely affect the whole psychological activity; When it reaches a certain severity, it can not only cause mental symptoms, but also constitute mental illness. It is one of the factors that affect brain health.