The normal body temperature of a 4-month-old baby is the same as that of an adult, between 35.5 and 37.2°C. This range is normal. 4 months old babies usually rarely get sick because they are protected by the mother’s antibodies, but if the family has a cold, it may be transmitted to the baby, resulting in symptoms such as fever, runny nose, nasal congestion, etc. It may also show symptoms such as reduced milk consumption, choking and coughing. So when you find that your baby has abnormal performance, you should pay attention to measure the temperature, and you can use cooling patches for low temperature below 38℃ and feed more water at the same time. It is better to take a warm bath or wipe your baby’s body with warm water to cool down over 38℃, and use antipyretic medicine as little as possible.