The late symptoms of malignant lymphoma mainly include the following: 1) itchy skin, which causes infection after ulceration occurs, leading to oozing or skin flaking; 2) fever, night sweats, chronic anemia, weight loss and other symptoms; 3) immune deficiency leading to central infection, manifesting as meningitis and brain abscess, and in severe cases, malignant lymphoma invades the cerebral cortex, triggering cerebral hemorrhage and leading to death; 4) metastasis invading the head, leading to headache, fever, vomiting and drowsiness.