There are many causes of leukemia, need specific problems, specific analysis, specifically including the following: 1, the factors of drugs, such as ethylene double morpholine, chloramphenicol can cause leukemia; 2, low immunity, stay up late, the entire body’s internal environment is disrupted, it is easy to leukemia; 3, formaldehyde and some other substances, such as new home decoration materials directly after moving in, may lead to leukemia; 4, some of the drugs taken, can also lead to leukemia, such as ethylene double morpholine, chloramphenicol and other drugs.