By the time your child reaches his teen years, he probably falls asleep minutes after his head hits the pillow, Chances are, he likes to sleep at this point—and chances are it could be too much for your taste when Sunday morning turns into afternoon and your teen is still in bed.

But most teenagers are on a different clock than adults. They have trouble going to sleep at night even though they need up to 10 hours of sleep, so they often make up for it during the day if they can.

Encourage your teen to set a schedule according to how much sleep he needs, and to try to stick to it. Don’t nag, though; After a few days of being tired, your teen will take matters into his own hands.

Just Tired? Or Something More?

If your teenager complains about being tired all the time, consider his physical health. Teens are especially vulnerable to chronic infections that cause fatigue, such as anemia and infectious mononucleosis, which can be transmitting by coughing and sneezing as well as kissing.

Contact your doctor if your teen has these symptoms, which could signal mono:

• fever
• sore throat
• loss of appetite
• fatigue and weakness
• sore muscles