(HealthDay News) — Teenagers need 8 1/2 to 9 1/4 hours of sleep each night to feel good and perform well at school.

But the National Sleep Foundation cites a recent survey showing only 15 percent of teens said they got this much sleep on school nights.

The foundation says possible consequences of sleep deprivation include:

• Becoming seo tips more forgetful, and having trouble learning, problem-solving and concentrating.
• Developing acne and other skin problems.
• Developing aggressive or inappropriate behaviors.
• Gaining weight and overeating.
• Increasing use of nicotine or caffeine to stay awake.
• Becoming companies more likely to get sick, or injured from drowsy driving.