3-year-old children bacterial infection may have acute tonsillitis, bacterial pneumonia, meningitis and other diseases, which can be treated with medication and surgery. 1. Acute tonsillitis: If a 3-year-old child’s bacterial infection causes acute tonsillitis, parents can follow the doctor’s instructions to the child’s application of azithromycin granules, cefaclor dry suspension and other antibiotics. Repeated episodes affecting sleep, breathing and other conditions can be taken when necessary surgical treatment, such as tonsillectomy and other surgical methods. 2. Bacterial pneumonia: If the 3-year-old baby has bacterial pneumonia, parents can follow the doctor’s instructions to the child application of amoxicillin capsules, ampicillin capsules and other penicillin antibiotics. 3. Meningitis: If a 3-year-old child has meningitis caused by bacterial infection, parents can follow the doctor’s instructions for the child to use ceftriaxone sodium tablets, cefotaxime sodium tablets and other antibiotic medication. If necessary, the child can also undergo surgical treatment, such as lumbar puncture cerebrospinal fluid drainage, ventricular shunt drainage surgery and other surgical methods. Bacterial infections in 3 year olds can also lead to rashes, toxemia, and other illnesses. They should be examined by a doctor and treated as prescribed.