Fever in a 50-day-old baby: first of all, see whether the fever is high or low, if it is low, not more than 38.5 ℃, his mental state is very good, and breastfeeding is very normal, this time need to be clinically observed on it. Physical methods can be used, such as wiping the forehead, neck, armpits and groin with warm water, and be sure to drink plenty of water for better fever reduction. Then if there is a high fever, more than 38.5 ℃, because the baby for 50 days of small infants, his organs are not well developed, at this time can not be applied to antipyretic drugs, such as ibuprofen and acetaminophen medication, at this time to see the child is not breastfeeding is not very good, whether the mental state is not good, if not good at this time, it is necessary to go to the hospital in time to see a doctor. Because the younger the baby is, the lower the resistance, if there is a high fever, you need to except sepsis and other diseases.