The first thing to look for in an infant with internal heat is whether the tongue is thick, because most infants with internal heat have a thick tongue, because most of the internal heat in infants is due to long-term stagnation of milk and food, and the appearance of the tongue is thicker than normal. A normal baby’s tongue is slightly white, with a thin layer of moss and not particularly red, and the tongue is normal. Most infants will show signs of restless sleep and cry easily, and some infants will show signs of temper and irritability. Also look at the stool, the stool is dry or the stool frequency is long, a few days a stool. You can also feel the palm of the hand to see if the baby’s palm is dry and hot, if the palm is dry and hot, it proves that the baby does have internal heat. If you have internal heat, you have to analyze where it comes from, whether it is from wearing too much, or because the temperature and humidity in the room is not enough, the ratio is not coordinated, whether it is from improper addition of supplementary food, because too much supplementary food can also lead to internal heat.