Even once-a-month use of acetaminophen -- the best-known brand name is Tylenol -- may trigger asthma in teens. The link may explain some 40% of asthma in teens.

Using hands-free headsets while driving doesn't result in fewer accidents than using handheld cell phones, a study shows.

Women's chronic pain is different than men's, and health care providers and therapists need to focus on that, according to an expert.

Building muscle doesn’t require a lot of heavy lifting, just a lot of light weight lifting, a new study indicates.

There is now scientific evidence to back up the widely held belief that stress can interfere with fertility.

The FDA warned today that the prescription drug Lamictal, which is used to treat seizures and bipolar disorder, can cause aseptic meningitis.

It's still late summer, but the flu vaccine already is arriving. Get it ASAP, says the CDC, which will start it's "Flu Ends with U" campaign in September.

Is Dupuytren’s contracture inherited from family members? What causes this condition, and what are the risk factors for Dupuytren’s?

How does Dupuytren’s contracture progress? Which treatments are available as it progresses? Get the facts on Dupuytren’s contracture progression.

Some mental health problems, including moderate and severe depression, are more common among college students today than in the past, according to a study that looked back 12 years.

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.