Self-care is not lazy indulgence or extravagant enjoyment, but a rational lifestyle of actively maintaining physical and mental balance. It includes scientific work and rest rules, healthy eating habits, positive emotional adjustment, and reasonable pressure release. Self-care is the most basic responsibility adults have for themselves, and it is also the premise of taking better care of work and family. Physical self-care is the foundation of all good life states. Many adults ignore small physical discomforts for a long time, leading to chronic fatigue, poor sleep, gastrointestinal problems and sub-health conditions. Adhering to regular work and rest, avoiding long-term staying up late, insisting on daily exercise, and paying attention to nutritional collocation can effectively maintain physical vitality. Only with a healthy body can people bear work pressure and enjoy life happiness. Emotional self-care is equally important. Adult life is full of pressure, trivial troubles and interpersonal friction. Long-term suppression of negative emotions will lead to anxiety, depression and emotional breakdown. Emotional self-care means learning to accept negative emotions, release pressure reasonably, refuse excessive self-demand and self-blame, and learn to comfort and tolerate oneself. Keeping emotional stability is the core of maintaining life peace. In addition, self-care includes moderate boundary setting. Many people’s fatigue comes from excessive accommodation to others and endless compromise. Self-care teaches people to learn to refuse unreasonable demands, reserve private time and space for themselves, and not be kidnapped by interpersonal relationships and trivial matters. Maintaining appropriate boundaries can reduce internal friction and protect personal life rhythm. Effective self-care makes people more positive and powerful. People who know how to take care of themselves have more stable mentality, stronger pressure resistance, and clearer life cognition. They will not be exhausted by trivial life, nor lost in pressure and competition. In adult life, self-care is not a luxury, but a necessary lifestyle that supports long-term progress and stable happiness.