WebMD explains why and how teens manipulate their parents and how parents can respond effectively.

Repetitive head traumas and concussions, including the type sustained by many professional football players, may increase the risk for developing a motor neuron disease that looks and acts a lot like amyotrophic lateral sclerosis (ALS) or Lou Gehrig’s disease.

Overweight children at risk for diabetes are also face higher risk for developing weak bones, a new study says.

Eggs are behind a nationwide salmonella outbreak causing hundreds of illnesses each week since May. A nationwide egg recall involves over a dozen major brands.

Despite concerns that an "only" child may be spoiled by his or her parents, new research suggests that teenagers without siblings don't seem to be disadvantaged at all in the development of social skills.

Hearing loss in teens has gone up, with one in five U.S. adolescents showing some degree of hearing loss in 2005-2006, according to a new study.

Scientists have developed a coating for use in health care settings that they say kills the deadly MRSA germ, a new study reports.

Researchers have discovered clues that may help identify which people with depression are at risk of developing bipolar disorder.

Obesity rates among children appear to be dropping for some groups, but not for all, new research suggests.

Unless it says “light” on the label, that frosty beer you drink may increase the risk of developing psoriasis, new research indicates.

Chocolate may be loaded with calories, but it also may be good for your heart if it's eaten in moderation and is also of high quality, new research suggests.

A simple and structured approach to doing homework appears to cut homework problems by more than half in kids with ADHD, a study shows.

The oil spill in the Gulf of Mexico poses serious health risks for the people who are working to clean it up and others who venture into the coastal area, scientists say.

Cutting back on red and processed meats may significantly reduce heart disease risk in women, a new study says.

A probiotic supplement may be an option for parents trying to soothe a colicky baby, according to a new study.

Personality type and the ability to control anger and other aggressive behaviors may have an effect on heart health and one’s risk for stroke, according to a new study published in the journal Hypertension.

Procreation, wanting affection – these are just a couple of reasons people have sex. WebMD lists 20 common sex motivations and the difference between men’s and women’s reasons.

Scientists in Germany have found the biological mechanisms behind nickel allergy, a common cause of contact allergic dermatitis that causes itching, burning, and redness.

Today's media superheroes -- including Batman in the movie The Dark Knight and the Hulk in Planet Hulk -- as well as the ''slacker'' characters often portrayed in TV shows and movies offer boys poor role models, says a University of Massachusetts professor.

The FDA has approved Ella, a new morning-after contraceptive pill effective for up to five days after unprotected sex or contraceptive failure.