A bacterial blood infection is a bacterial infection in the bloodstream. How long it takes to recover is related to a variety of factors, including the severity of the condition, the patient’s general condition, and the treatment. In mild cases, recovery can take several days, while in severe cases it can even be life-threatening. If the bacteria that invade the bloodstream are small and can be cleared by the body’s defenses and there are no obvious symptoms of toxemia, it is called bacteraemia. Patients can be treated with oral antibacterial drugs, such as amoxicillin and cephalosporin, under the guidance of a doctor, and usually recover in a few days. However, if the number of bacteria in the blood is large and virulent, the bacteria proliferate rapidly and produce a large amount of toxins, which is called sepsis at this time, and serious cases may develop infectious shock and endanger life. Therefore, patients need to control the disease as soon as possible, blood culture, select sensitive antibiotics, from the root to completely kill the bacteria, its course of treatment will be relatively longer. In conclusion, blood bacterial infections need to be taken seriously, and if they develop into sepsis, their morbidity and mortality rate can be as high as 30-40%.