New research links tattoos with cancer. Here's what scientists know about the potential connection, and their advice for you if you have a tattoo or you're thinking about getting inked.

PAD is a disease characterized by restricted blood flow in the vessels of the brain and heart. Here’s what causes it, how to prevent it and how it’s treated.

Your lungs breathe in and out about 20,000 times a day. Find out more about how they work and what you can do to keep them healthy.

Reiki Therapy: Reiki therapy, also called energy healing, is based on an Eastern belief that vital energy flows through your body. Know more.

See what happens during knee replacement surgery in this video and learn about the surgical procedure that helps relieve severe knee pain.

If your body is not taking in the vitamins, nutrients, and minerals you need, it could be because of malabsorption syndrome. Learn what causes it and what you can do about it.

WebMD provides information on popular vitamins and supplements including side effects, drug interactions, user ratings and reviews, medication over dose, warnings, and uses.

Erections: Use It or Lose It? What the research says about whether sex and masturbation help prevent erectile dysfunction.

The experts at WebMD provide a list of common diabetes drugs.

Find in-depth information on endometriosis, which most often occurs in women between the ages of 25 and 40. Understand symptoms and treatment options.

Your legs are an amazing collection of bones and muscles. But if something goes a bit wrong, they can hurt and make it hard to move around. Find out what you should know with this WebMD slide show.

If you're trying to get pregnant, use this WebMD tool to find out when you likely ovulate and are most fertile.