Bacterial infections can manifest as clinical manifestations in multiple parts of the body, such as fever, cough, sputum, headache, abdominal pain, diarrhea, urinary frequency, urinary urgency, etc. Clinical manifestations may occur in all parts of the body. Fever control is related to both the degree of fever and the causative bacteria, and if it is common bacteria, it can be cured mostly in 3-5 days and not more than 14 days. If there are multiple bacteria, or multiple drug-resistant bacterial infections, often called superbugs, the fever control does not always last, and even the infection can induce various organ failures that are life-threatening and require active treatment in the ICU. Therefore, it is vital to pay more attention in general, not to use antimicrobials indiscriminately, and to apply antibiotic treatment better and rationally.