Lymphoma is a blood disease. It is explained in the following three aspects: etiology, clinical manifestations and treatment. 1. Lymphoma is a malignant proliferative disease of lymphocytes originating in lymph nodes and lymphoid tissues. At present, it is believed that the occurrence of this disease is related to various factors such as infection, immunity, physicochemical and heredity. 2. Clinical manifestations of lymphoma patients include: painless progressive lymph node enlargement; unexplained fever, night sweats and weight loss. Patients involving pharyngeal lymph nodes may have difficulty in swallowing and nasal congestion; patients involving respiratory system may have cough and chest tightness; patients involving digestive system may have abdominal pain and diarrhea. 3. Treatment modes of lymphoma mainly include chemotherapy, radiotherapy, biological treatment such as monoclonal antibody, interferon and stem cell transplantation. Drugs include rituximab, cyclophosphamide, vincristine, adriamycin and so on. Warm tips: once patients find lymphoma, they should consult the doctor in time to clarify the type of lymphoma and actively treat it under the doctor’s guidance.