The symptoms of diffuse large B-cell lymphoma are as follows: First, the lymph nodes are enlarged, showing a soft texture, poor mobility and unclear demarcation with the border, and can involve extensive lymph nodes throughout the body, such as supraclavicular, axillary, inguinal or retroperitoneal, etc., and can also show abdominal pain and poor performance. Second, systemic symptoms such as fever, which is generally caused by lymphoma, the temperature is within 38.5℃, not accompanied by obvious chills and chills, and accompanied by night sweats, that is, sweating after sleeping at night, but no sweating after waking up. Thirdly, weight loss of 10% or more, i.e. weight will be progressively wasted.