Five-month-old baby with fever, first of all, you should always have antipyretic medicine at home, once the temperature exceeds thirty-nine degrees, you should take antipyretic medicine orally. To relieve the discomfort caused by the baby’s fever or cause high fever convulsions. Choose ibuprofen or acetaminophen are available. If the fever is low and the temperature is below thirty-nine degrees, the baby can be physically cooled by applying antipyretic patches as well as warm water baths, etc. You can also take oral Chinese medicine to help cool down the fever. In addition, you should give your baby a few times to drink warm water, because the fever through the skin of the unobtrusive water loss increased, there will be a lack of water, and more urination can also let part of the heat from the urine inside, thus helping to cool down.