Inflammation in the blood means that there is an infection in the blood, which can be seen in bacterial infection, viral infection or fungal infection. Among them, bacterial infection is the most common. After bacterial infection in the blood, if the number of infected bacteria is relatively small, the bacteria is not very virulent, and the patient’s own immunity is also very good, generally there will not be serious consequences, after general antibacterial drug treatment, through the role of autoimmune regulation, most of the bacteria will be destroyed, and the patient can recover. However, in the case of patients with low autoimmune system, such as leukemia patients after chemotherapy, the immune system is severely depressed and very pathogenic bacteria and viruses can invade the body. Patients can develop symptoms such as high fever, chills, chills, bleeding spots and petechiae on the skin mucosa. This condition is called sepsis and requires active antibacterial drug treatment. A blood culture test is done to identify the causative organism, and then sensitive antibacterial drugs are given according to the drug sensitivity test, such as the application of meropenem and other drugs. Usually after combined treatment, the infection can be controlled.