Quit-smoking basics
Learning Center
Video: Rotator cuff damage
See how your rotator cuff can become damaged.
Slide show: How your brain works
Which part of your brain does what? Take a tour with this slide show.
Ringworm (scalp)
Learn more on causes, symptoms, treatments of this easily spread, itchy fungal skin infection and how to prevent it.
Thalassemia
Some forms of this inherited blood disorder usually show up before the age of 2, often causing anemia. More severe forms of the disease require regular blood transfusions.
Video: Smoking — Anatomy of nicotine addiction
This animation illustrates how smoking changes your brain, causing nicotine addiction.
Clinical depression: What does that mean?
The term "clinical depression" means severe, persistent depression. It's also called major depression or major depressive disorder.
Reactive hypoglycemia: What can I do?
Reactive hypoglycemia is low blood sugar that happens after eating.
Cigar smoking: Safer than cigarette smoking?
Despite what you might think, cigars aren't that different from cigarettes. Like cigarettes, cigars contain nicotine, tobacco and cancer-causing chemicals.
Hookah smoking: Is it safer than cigarette smoking?
This habit isn't safer than smoking cigarettes. Find out why.
Heart rate: What's normal?
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
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