What Is Seasonal Affective Disorder? Seasonal affective disorder (SAD) is depression that happens only at a specific time of year. With SAD, a person becomes depressed in fall or winter, when days are ...

Medically reviewed by: Lonna P. Gordon, MDThis link opens in a new tab Learn About Adolescent Medicine & Pediatric Gynecology at Nemours Children's HealthThis link opens in a new tab Any time a couple ...

What's the Digestive System? Even before you eat, when you smell a tasty food, see it, or think about it, digestion begins. Find out how the digestive system works, from start to finish, in this video ...

Medically reviewed by: Amy W. Anzilotti, MDThis link opens in a new tab Learn About Primary Care Pediatrics at Nemours Children's HealthThis link opens in a new tab A person also can get infected if ...

Medically reviewed by: Lauren M. O'Donnell, PsyDThis link opens in a new tab Learn About Behavioral Health (Psychology and Psychiatry) at Nemours Children's HealthThis link opens in a new tab Whatever ...

Medically reviewed by: Tal Grunwald, MDThis link opens in a new tab Learn About Endocrinology (Hormones & Growth) at Nemours Children's HealthThis link opens in a new tab The thyroid is a small gland ...

Medically reviewed by: Yamini Durani, MDThis link opens in a new tab Learn About Primary Care Pediatrics at Nemours Children's HealthThis link opens in a new tab Even with these precautions in place, ...

Medically reviewed by: Joseph H. Piatt Jr., MDThis link opens in a new tab Learn About Neurosurgery Care at Nemours Children's HealthThis link opens in a new tab A ventriculoperitoneal (VP) shunt is a ...

Medically reviewed by: T. Ernesto Figueroa, MDThis link opens in a new tab Learn About Urology at Nemours Children's HealthThis link opens in a new tab Testicular torsion is an emergency condition. It ...

Medically reviewed by: Melanie L. Pitone, MDThis link opens in a new tab Learn About Endocrinology (Hormones & Growth) at Nemours Children's HealthThis link opens in a new tab A kind of sugar called ...

Why Do I Need Sleep? Sleep is more important than you may think. The average kid has a busy day. There's school, taking care of your pets, running around with friends, going to sports practice or ...

Why Is Hand Washing So Important? It's a message worth repeating — hand washing is by far the best way to keep kids from getting sick and prevent the spread of germs. When kids have contact with germs ...