Blood cholesterol levels ebb and flow according a woman's menstrual cycle, and screening tests should be timed accordingly for the most accurate results, a study shows.

Are your kids getting enough of these four essential nutrients often missing from kids' diets?

A new way of classifying rheumatoid arthritis should lead to earlier identification of the disease, which, in turn, should help investigators explore new therapies to prevent its ravages, researchers say.

Potiga, a new epilepsy drug that works differently than others, is effective with controllable risks, an FDA advisory panel says. Full U.S. approval is expected.

Potiva, a new epilepsy drug that works differently than others, is effective with controllable risks, an FDA advisory panel says. Full U.S. approval is expected.

Pro Golfer Phil Mickelson recently announced that he is being treated for psoriatic arthritis. According to media reports, he first developed symptoms right before the U.S. Open, and the pain quickly became so intense that he couldn’t walk.

Menstrual cramps may actually change the structure of women's brains, according to new research in the journal Pain.

The risks of swine flu in pregnant women are higher, but WebMD provides guidelines for preventing infection and what to do if you suspect you’ve been exposed to swine flu.

WebMD talks to pediatricians for answers to common questions parents have about the H1N1 swine flu.

Myths about swine flu and seasonal flu are everywhere, and it’s hard to know the truth about the flu. WebMD goes over the top myths regarding the flu and provides factual, helpful information.

One in 10 American teenagers has abused cough or cold medicines with DXM to get high, making it more popular in that age group than cocaine, ecstasy, LSD, and meth. Parents and teens need to know the risks and dangers of DXM abuse.

Teens are pressured by peers to try risky new behaviors that put their health in danger -- including smoking, drinking, using drugs and having sex -- at a surprising young age. Here's how parents can help.

Is your teenager rebelling, defying your curfew, or hanging out with questionable kids? Here's expert advice on how to nip behavior problems in the bud.

Excessive sweating can be caused by serious medical conditions, including diabetes, thyroid problems, and infections. Is your sweating normal?

NDM, a recently identified gene that makes germs impervious to antibiotics, is spreading worldwide among bacteria in the gut that most commonly cause infections.

A significant drop in temperatures may be a trigger of heart attacks in elderly people, new research indicates.

There has been a dramatic decline in hospital-acquired and other health care-related MRSA infections, the CDC reports.

Hormone replacement therapy (HRT) and breast cancer risk have been long studied, and now a new analysis finds higher risks for normal-weight women and those on combination estrogen/progestin therapy.

Parents whose teenagers spend a lot of time watching TV or fiddling around on computers are worried that their youngsters’ tube and digital time may make it harder for them to talk with their children about the dangers of substance abuse, new research indicates.

The H1N1 swine flu pandemic is over. The WHO today declared the world to have entered the "post-pandemic period" with H1N1 becoming a seasonal flu bug.