Low immunity and environmental pollution become important triggers Recent clinical studies have confirmed that low immunity and environmental pollution become important triggers. Various types of leukemia, malignant lymphoma and multiple myeloma are known as the three most prevalent hematologic tumors. Relevant data show that in western countries, acute leukemia, malignant lymphoma, multiple myeloma and other hematologic malignant tumors are located in the top ten of malignant tumors, and the incidence rate in our country has been on the rise year by year, with a rate of 4% per annum, of which 3-4/100,000 for leukemia and 3.5/100,000 for malignant lymphoma. Although no large-scale research has been conducted in China, it has been found through the patients with hematologic tumors admitted in recent years that the number of patients with hematologic tumors is indeed increasing. There are three reasons for the analysis: 1. Nowadays, people’s living standard has been substantially improved and their money bags are full. Once they find themselves uncomfortable, people will take the initiative to seek medical treatment in hospitals. There are also various ways to understand and recognize hematological tumors and know that it is a treatable and controllable disease, so the consultation rate naturally increases a lot. With the improvement of diagnostic technology, there are fewer and fewer “fish in the net”. 3. The number of morbidity is on the rise, and more and more cases of leukemia and malignant lymphoma are found in clinics. While people are pursuing quality life, they are also invariably put in a dangerous environment: car instead of car makes traveling more convenient, but aggravates air pollution; industrial development provides more consumer goods, but also takes away clean water; “fine” decoration improves the living environment, but brings formaldehyde exceeding the standard and benzene pollution. …… These are all factors contributing to the high incidence of hematologic tumors. It is also noted that the clinic also found a prominent phenomenon: when the young people who often work overtime, stay up late and other factors resulting in reduced immunity, encountered such as the hidden dangers brought by the renovation of the living environment, such as pollution, the occurrence of blood tumors, especially leukemia, lymphoma, the chances of increasing.