3-year-old children in the middle of the night nosebleed is mainly due to the dry nasal mucosa caused by the nasal mucosa dry, nasal mucosa is particularly easy to produce rupture, so as to form the phenomenon of bleeding. At night, children often sleep on their stomachs, or sleep is easy to touch the nose with their hands, especially in the state of nasal mucous membrane dryness nose dry, itchy, the child will involuntarily use their hands to touch, it will easily lead to nose bleeding phenomenon. Especially in the dry autumn and winter, the indoor air is dry when the child is more prone to nosebleeds, you can go to bed every night before the nasal cavity into the vitamin AD drops, to relieve the dry state of the nasal mucosa, and at the same time to increase the humidity of the indoor air, you can put a pot of water or humidifier and will be placed on the floor after washing clothes, through the evaporation of water vapor to make the indoor air to reach the state of humidity, you can Avoid the phenomenon of nosebleeds. If your child has frequent nosebleeds in the middle of the night for a long period of time, you need to take your child to the ENT department of the hospital to see if he or she has any blood problems or coagulation problems.