In recent years, the incidence rate of lymphoma has indeed shown a rising trend, with an average of 1 new patient every 9 minutes globally, and about 25,000 new patients in China every year. Among them, the incidence rate of non-Hodgkin’s lymphoma has been increasing at an annual rate of 3%-5%, which is the fastest growth rate among all malignant tumors. Causes of “Lymphoma”. The lymphatic system is an important defense system of the body, which can help the body to resist the attack of viruses, bacteria and other harmful foreign substances. When germs and other harmful substances invade the body, the lymphatic tissue can easily get out of the body’s control. When there are more and more cancer cells, coupled with the effects of emotional stress, adverse environment and other factors, lymphocytes may mutate during the growth process, forming a crazy lymphoma. Why is the incidence of lymphoma high among young and middle-aged people? Currently, lymphoma patients are mostly seen in young and middle-aged people, especially those who are sub-healthy with low immunity due to high pressure from work and life, and there are more male patients than female patients. This may be due to the fact that the immune system of young people is in the process of development, coupled with the stress of work and life, lack of physical exercise, plus some bad habits such as staying up late, etc., which are more likely to cause low immunity, which may bring external conditions for the disease of lymphoma. Early symptoms of malignant lymphoma are not obvious. Early stage of lymphoma can have no symptoms, a few people can have three major limb symptoms, but because the signs are not particularly obvious, it is easy to be ignored. For example, persistent or intermittent fever up to 38°C with higher temperatures in the afternoon and at night, night sweats, and significant weight loss, usually up to 10% of the original body weight. All of these symptoms are similar to fatigue-induced immunodeficiency, and therefore, are often overlooked. In addition, painless lymph node enlargement is often the most common symptom, most of which occurs in the neck, armpits and groin; if unexplained lymph node enlargement occurs, it is necessary to pay high attention. How to prevent? Self-examination of lymphoma is the key. Contact the surface of the body whether there are enlarged lymph nodes, especially pay attention to the neck, armpits, groin and other parts of the mass, the general diameter of more than 1 cm of the mass has clinical examination significance, need to go to the hospital in time for further examination. Three main symptoms to pay special attention to: 1, emaciation, weight loss of more than 10% in a short period of time; 2, night sweats; 3, frequent low-grade fever. Six groups of people are at highest risk: 1, white-collar workers with high work pressure; 2, people who often stay up late; 3, people who are overworked for a long time; 4, people who are often in the environment of electronic radiation or rays; 5, people who often use poor-quality hair dyes; 6, people who often come into contact with chemical preparations containing benzene or organic solvents.