Baby fever 37.8 degrees, this situation is low fever, if the child is in good spirits, no other symptoms, or accompanied by a slight runny nose, cough, mostly considered as upper respiratory tract infection, that is, caused by the cold. You can give your child more water and observe physical cooling, including warm baths and wiping the baby’s neck, thighs, armpits, hands and feet with warm water. It is possible to take appropriate heat-clearing and anti-viral Chinese medicine, such as Pudilan anti-inflammatory oral solution for observation. Because low fever in babies may cause a variety of diseases, it is important to keep an eye on your child’s condition. If the child has repeated low fever for more than 3 days, or if it is accompanied by other systemic symptoms, such as worsening cough, poor mental status, vomiting, nausea, diarrhea, etc., this condition must be seen by a pediatrician for a clear diagnosis and then treated symptomatically.