The causes of Staphylococcus aureus infection may be related to low immunity, food contamination and cold. 1. Low immunity: for example, cold, fatigue and malnutrition may cause the body’s immunity to decline, and easily infected by the staphylococcus aureus bacteria that exist in the body itself. 2. Food contamination: If some food infected by S. aureus is used, it will also lead to the human body being infected with S. aureus. In addition, the misuse of antibiotics can also cause overgrowth of drug-resistant S. aureus in the intestine, resulting in S. aureus enteritis, and the two cases need to be distinguished. 3. Wounds on the skin or mucous membranes: surgical incisions or wounds caused by trauma, if the surgical instruments are not sterilized properly or the wounds are not disinfected or dressed properly, they may also be infected with S. aureus, resulting in suppurative infections, or even the formation of abscesses. In addition, Staphylococcus aureus has a certain degree of harm, it is recommended that patients go to the regular hospital as soon as possible to receive examination, diagnosis and treatment under the guidance of the doctor.