If the younger the fetus, the more complications, jaundice into the brain is generally more likely; if the child is older and has fewer complications, jaundice into the brain is generally less likely, but also with the specific circumstances to determine. Generally speaking, if the fetal age is smaller, such as very young preterm babies, and more complications after birth, such as neonatal hemolysis, infections, etc., such a situation may be very low bilirubin is easy to enter the brain. If the child is older, e.g. full term, and has fewer complications, the chance of brain entry is generally higher when the level of jaundice is very high. As you can see, there is no way to determine the specific chance of jaundice entering the brain, and it needs to be judged on the basis of the child’s specific condition, and you can only determine whether there is a possibility of jaundice entering the brain through the child’s behavior. It is recommended to go to the hospital in time and let the doctor judge according to the condition.