A baby’s body temperature of only 35.5°C is not normal, because it is already below the normal body temperature range of 36°C to 37°C. Moreover, the baby’s metabolism is very strong and the body temperature should be slightly higher than the normal body temperature of an adult, so a low temperature is definitely not normal. If the thermometer is not damaged and used correctly, but still at this temperature, it is likely that the baby is weak, or the baby is not wearing enough clothes, or is staying in a cold environment for a long time. Therefore, it is recommended to give the baby some hot water and add some clothes to raise the temperature first. If the temperature does not improve, you should consult a doctor. Generally speaking, a body temperature below 36°C is considered hypothermia. Young children are prone to hypothermia because their central thermoregulatory system is not yet well developed and they have thin subcutaneous fat that dissipates heat easily. Once parents find their baby’s body temperature is too low, they must take measures to raise the body temperature or seek the help of a doctor. 1, the room temperature should not be lower than 20 ℃, must give the baby wear thick warm clothes, there should be a cotton hat, preferably placed outside the cotton hat one or several hot water bags to keep warm; in the baby to change clothes should pay special attention. 2, appropriate supplementation of glucose, so to a certain extent can also enhance the baby’s ability to resist the cold, conducive to the recovery of body temperature. 3, if the above methods do not work, the baby’s body temperature is still too low, must promptly go to the hospital to seek medical help to identify the causes of hypothermia, and take further treatment and care.