Most teens need 8 to 10 hours of sleep each night. But many have trouble sleeping. Lack of sleep can affect your mood, relationships, and ability to pay attention. When you don’t get enough sleep, it’s hard to be at your best in school and sports. It can increase the chances of getting sick, gaining …
Do shots make you nervous? You’re not alone. Lots of people dread them because they have a very real fear of needles. So next time your doc asks you to roll up your sleeve, try these tips: Distract yourself while you’re waiting. Bring along a game, book, music, or movie — something you’ll get completely caught …
What Is a Tattoo? A tattoo is a permanent kind of body art. A design is made by puncturing the skin with needles and injecting tattoo ink into the deep layer of the skin. Tattoos used to be done manually — that is, the tattoo artist would puncture the skin with a needle and inject …
What Is a Body Piercing? A body piercing is just what it sounds like — a piercing or puncture made in the body by a needle. After that, a piece of jewelry is inserted in the hole. Commonly pierced body parts are the ears, nose, and the belly button. Oral piercings include the lip, cheek, …
What Is Acanthosis Nigricans? Acanthosis nigricans (ah-kan-THO-sis NY-gruh-kans) is a skin condition. It causes thicker and darker patches or streaks, usually in skin creases and folds, such as the sides and back of the neck, armpits, elbow pits, and groin. But it can show up anywhere on the body. It may look velvety or warty, …
Blood Humans can’t live without blood. Without blood, the body’s organs couldn’t get the oxygen and nutrients they need to survive, we couldn’t keep warm or cool off, fight infections, or get rid of our own waste products. Without enough blood, we’d weaken and die. Here are the basics about the life-sustaining fluid called blood. …
