Sleep apnea is a disease in which the child or infant stops breathing periodically during sleep. There are several types of sleep apnea, some of which are more common in the older infant and child. At 28 months of age your son probably suffers from obstructive sleep apnea, where something blocks his airway when he falls asleep. Most commonly, enlarged tonsils and/or adenoids cause the blockage. Your son may be snoring loudly with periodic long pauses in his breathing pattern. He may appear more tired during the day because of restless sleeping at night. Other things that can cause blockage of the airway include reflux of stomach contents, decreased tone of the muscles about the neck and mouth, and severe obesity. Seizures can also mimic sleep apnea. Your child's sleeping problem needs a thorough evaluation, which may include monitoring his breathing and brain activity during sleep. If he is found to have obstructive sleep apnea from enlarged tonsils and adenoids, then the tonsils and adenoids need to come out.