Neonatal jaundice is divided into physiological jaundice and pathological jaundice. Physiological jaundice of newborns usually does not show symptoms of drowsiness, while pathological jaundice will show symptoms of drowsiness when it is serious, accompanied by other symptoms, such as abnormal milk intake, abnormal feces and so on. 1. Physiological jaundice: physiological jaundice usually appears 2~3 days after birth for full-term babies, and 3~5 days for preterm babies, and usually lasts for 5~7 days, not more than two weeks. This kind of jaundice is relatively mild, mainly confined to the face and neck, and in some cases, it may also spread to the trunk, and the skin is mainly light yellow, and the newborn is in a good mental state, with no obvious abnormal symptoms, and there will not be any drowsiness. 2. Pathological jaundice: this kind of jaundice appears earlier, usually within 24 hours of birth, and lasts longer, more than two weeks for full-term babies, more than four weeks for preterm babies, jaundice will recur, the mental state is relatively poor, there will be sucking powerlessness, the urine color is abnormal, and the color of the feces becomes lighter. When the jaundice is severe, it will involve the nerves, resulting in nerve damage, drowsiness and even convulsions. It is difficult to tell whether a newborn is drowsy or not because he/she sleeps a lot. If there are symptoms of jaundice accompanied by an increase in sleep, you should communicate with your doctor in time to clarify the cause of the problem and deal with it.