If the baby’s routine does not affect the daily life and diet, there is no need to make deliberate adjustments; however, if the child’s routine is irregular, the whole life is more disordered, and the sleep rhythm is more disturbed, you need to make adjustments accordingly. First of all, we should pay attention to the adjustment of light, it will have an impact on melatonin, if you want your baby to sleep less during the day and sleep longer at night, the light during the day should be brightened, open the curtains, and the light at night should be dimmed, so that the child’s melatonin secretion is better, which will naturally form the night sleep rhythm. Some diseases can affect your child’s sleep. If your child does sleep for too long, you should also look for any diseases that affect sleep. There is usually a connection with various diseases that affect brain function, such as early hypoxia or asphyxia affecting the brain, or asthma or rhinitis causing blockage of the nasopharynx and resulting in lack of oxygen, which can also cause excessive sleep in children. Children with functional maladies of their own, epilepsy, seizure sleeping disorders, and other brain disorders can also affect sleep, but this is less common in preschoolers.