Blood inflammation is the infection of the blood with pathogenic microorganisms, commonly viral infections, bacterial infections, and fungal infections. Among them, bacterial infection is the most common type, and according to the severity of the disease, bacterial infection is divided into three conditions: bacteremia, sepsis and septicemia. Bacteremia means that the number of infected bacteria is relatively small, the toxicity is weak, the patient’s symptoms are relatively mild, and generally after antibacterial drug treatment, through the body’s immune function, most of the bacteria are eliminated and have little effect on the human body. Sepsis means that the bacteria are large in number and virulent, and proliferate in the blood, releasing a large amount of toxins. Patients show symptoms such as chills, chills, high fever, skin petechiae, etc., and need active treatment. If the sepsis is not well controlled, sepsis will be formed, that is, the bacteria metastasize to other vital organs and form abscesses locally, so that the condition is more critical.