Obstructive sleep-disordered breathing is common ( 1 to 10 per cent) in children. The majority of these children have mild symptoms, and many outgrow the condition. Some of them are often tired by day, have trouble paying attention, have other behavioural problems and also have difficulty thriving socially and academically. In more severe cases, sleep apnea is responsible for the growth and cognitive delays, high blood pressure and heart problems. It's important to see a doctor if you suspect sleep apnea in your child.