Newborn baby 37.5 is fever, belongs to the low fever. Due to the incomplete development of the thermoregulatory center, the body temperature of newborns can easily change with the external temperature change. Increase water intake appropriately and monitor body temperature. If the fever gradually subsides and the mental state and feeding state are as usual, the body temperature can be monitored at home. If the temperature continues to rise, or if the temperature recedes and rises again, it may also be a fever caused by a respiratory tract infection, so you need to go to the hospital in time to avoid delaying the condition.