The etiology and pathogenesis of lymphoma are not fully understood, but the viral theory is quite popular. 1.Immune deficiency: such as AIDS, organ transplantation, rheumatoid arthritis, etc.; 2.Viral infection: such as HTLV, HIV, EBV, etc.; Helicobacter pylori is closely related to lymphoma in the extra-nodal marginal zone of lymph-like tissue associated with gastric mucosa; 3.Chemical carcinogens such as pesticides and hair dyes; 4.Other factors such as radiation exposure, etc.; 5.Long-term dietary structure: living habits and other factors cause physique Over-acidification, the overall function of the human body decreases rapidly, which in turn causes the body’s metabolic circulation to slow down and blood stagnation, at which time some endogenous diseases will appear. Since the exact cause of malignant lymphoma is still unknown, it is difficult to take active and effective measures to prevent its occurrence. Clinically, according to the results of current research on the etiology of malignant lymphoma, giving appropriate prevention to high-risk groups may help to delay or interrupt the occurrence of the disease, and for patients who have achieved complete remission after treatment, it is possible to prolong the remission period if active preventive or therapeutic measures are given It is possible to prolong remission or even stop its recurrence if active preventive or therapeutic measures are given to patients who have achieved complete remission with treatment. This is done by paying attention to climate change and preventing and actively treating viral infections. Actively treat other chronic diseases that may be associated with the development of this disease, such as chronic lymphadenitis, autoimmune diseases, etc. Strengthen physical exercise to improve the immunity and disease resistance of the body and avoid unnecessary injury or stimulation. Pay close attention to changes in superficially enlarged lymph nodes, and be on high alert for patients with similar diseases in family members.