Self-care refers to people's own health behaviors and health-related decisions in order to maintain and improve their health, prevent, find and treat diseases. Self-care includes health care activities characterized by self-help (including mutual assistance) carried out by individuals, families, neighbors, colleagues, groups and units. Can give full play to their own health potential and personal subjective initiative, improve people's sense of responsibility for health. By carrying out health activities, people's awareness and ability of self-care can be improved, people's consciousness and initiative can be enhanced, and people can be urged to implement physical self-protection, psychological self-regulation, self-control of behavior and lifestyle and self-regulation of interpersonal relationships, thus improving the health quality of the population.