The baby sleep body temperature is very hot and room temperature, the blanket is too thick and other physiological factors, but also consider and viral cold, tonsillitis and so on. 1. Physiological factors: high temperature of the sleeping environment, the blanket is too thick, before bedtime strenuous exercise, etc., may cause some of the baby sleeping body temperature is very hot. 2. Viral colds: viral colds are mainly related to viral infections, and cold, sudden changes in climate, etc. are triggers. If the baby has a viral cold, there will be fever, which can be manifested as a very hot body temperature. Some babies are also prone to nasal congestion, runny nose, cough, crying and other symptoms. 3. tonsillitis: tonsillitis can also cause fever in some babies, which manifests itself as a very hot temperature in bed. Tonsillitis is related to infectious factors, immune factors, etc., the child is also prone to accompany the pain in the throat, chills, vomiting, poor quality of sleep, refusal to eat, crying and other symptoms. There may be other reasons why your baby’s temperature may be very hot, so we recommend that you go to the hospital in time for a complete examination to determine the cause of the illness, and then give targeted treatment under the guidance of the doctor.