Immune dysfunction is the failure of the immune system to function as a true and effective self-defense under certain triggers, resulting in hyper- and hypo-immune function that cannot heal itself. Patients can improve or enhance their immunity by exercising, changing their lifestyle, diet, or taking medications under the guidance of a doctor. To improve immunity, patients need to adjust their working hours, avoid staying up late, go to bed early and wake up early, keep a regular routine, adjust their mindset, avoid excessive anxiety, eat a balanced diet, drink more water, and eat more foods rich in vitamins, iron, calcium and other elements. Keep exercising to improve body functions. If immune disorders cause diseases such as blood disorders, aplastic hematopoietic system diseases, dermatomyositis, systemic lupus erythematosus, dry syndrome and other diseases, it is necessary to immediately consult a doctor, have an examination, take immunity-regulating drugs or immunosuppressants under the guidance of a doctor, and treat the primary disease so as to restore the body’s resistance.