One third of a person’s life is spent in sleep, and sleep is very important for everyone. Children, especially infants and toddlers, are still in the developmental stage of the brain, and adequate sleep is necessary to ensure growth and development. Difficulty in sleeping and poor sleep quality in babies can affect height, immunity, learning, socialization and many other aspects. There are many reasons why babies have trouble sleeping: (1) bad sleep habits, irregular sleep, holding and rocking before bedtime, and sleeping with a nipple. (2) Excessive excitement or frightening stimulation during the day, mosquito bites, wet diapers, hunger and discomfort, too thick and warm bedding at night. (3) Malnutrition, micronutrient deficiency such as vitamin D deficiency, calcium deficiency, etc. (4) Intestinal parasitic infections such as pinworm disease leading to anal itching. (5) Milk protein allergy, eczema, etc., baby colic at night, itchy skin leading to baby sleep difficulties. (6) Babies with other diseases such as otitis media, urinary tract infections, neurological disorders, colds, etc. cause difficulty in falling asleep. Sleep quality is not only a concern for adults, but also for babies. Sleep disturbance and difficulty in falling asleep are the main problems of sleep disorders in children. It is important to find out the reasons why your child has difficulty sleeping and improve sleep in order to promote your baby’s healthy growth.