The prognosis of phagocytic syndrome is poor, and the exact survival period varies from person to person. If left untreated, death can occur in 30 days in most patients, and if the treatment is effective against the cause, patients can achieve long-term survival. Phagocytic syndrome refers to a group of syndromes caused by severe bacterial or viral infections (EBV is common), tumors (especially T-cell lymphoma), or autoimmune diseases that cause immune dysfunction in the body and produce phagocytic cells. The main clinical manifestations of this disease are persistent high fever, the presence of complete blood cytopenia, impaired liver function, abnormal coagulation function, and increased ferritin. The mortality rate of phagocytic syndrome is high and the prognosis and treatment outcome, which varies relatively widely from patient to patient and from etiology to etiology. It has been shown in some studies that the disease has a 30-day survival rate of only 56%-70% and a 3-year survival rate of about 20%-55%. Thus, there is a higher risk of early death of phagocytosis, which may occur within 1 month, but some patients may not only be cured but may even achieve long-term survival without recurrence. In addition, the clinical manifestations of hemophagocytic syndrome are intricate and difficult to treat, so patients are advised to visit a tertiary care hospital.