One-week-old baby high fever can be seen in the upper respiratory tract infection, pneumonia, viral meningitis, etc., need to be treated according to the cause of the disease, including symptomatic treatment, causative treatment and so on. 1. Symptomatic treatment: commonly used drugs are non-steroidal anti-inflammatory drugs, such as ibuprofen, acetaminophen and so on. Warm water can also be used for bathing, which can help dissipate heat. Drink plenty of water to avoid water loss. 2. Treatment of the cause: If it is caused by upper respiratory tract infection, symptomatic treatment is the mainstay. If it is caused by pneumonia, if it is bacterial infection, it can be treated with antibacterial drugs, such as cefaclor, etc. If it is caused by viral meningitis, it can be treated with antibacterial drugs. If it is caused by viral meningitis, need to carry out antiviral treatment, such as acyclovir and so on. If the baby has a high fever, it is recommended to consult a doctor promptly. The above medication must be used under the guidance of a doctor, do not use your own medicine.