Children of all ages can develop obstructive sleep apnea syndrome. Obstructive sleep apnea is seen in 1 percent to 5 percent of all children and can lead to many complications if left untreated. Snoring is the main symptom of obstructive sleep apnea, and children who snore on all or most nights should be evaluated for this disorder. Some children are at higher risk for the disorder, including children who have large tonsils and adenoids, and those that are overweight. Obstructive sleep apnea can lead to trouble with learning, behavior problems (such as hyperactivity), difficulty growing, bed-wetting, high-blood pressure and heart problems.