Blood is normally free of bacteria. Blood is a red, opaque, viscous liquid that flows through the body’s blood vessels and heart and contains inorganic salts, oxygen and nutrients such as cellular metabolites, hormones, enzymes and antibodies. It has the functions of nourishing tissues, regulating organ activity and defending against harmful substances. Under normal circumstances, bacteria cannot enter the bloodstream, but when the body has an immune dysfunction, poor immune function or obvious trauma such as skin trauma, bacteria will enter the bloodstream. If bacteria are found in human blood, it is medically called bacteremia. If accompanied by shock and other organ function problems, sepsis may occur. Once bacteria are present in the bloodstream, it is important to treat with antibiotics as prescribed by your doctor, including penicillins and cephalosporins, such as penicillin and cefixime tablets. Early diagnosis can help treat the disease more accurately and may reduce the risk to the body. Specific diagnosis and medication should be made under the supervision of a physician.