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SUNDAY, Feb. 5 -- More than 60 percent of American teens have at least one profile on a social networking site, and many spend more than two hours a day on social networking sites, according to the American Academy of Child and Adolescent...

SUNDAY, Feb. 5 -- Although there is a stigma associated with having head lice, infestations with these small insects are common and nothing to be ashamed of, according to Dr. Hannah Chow-Johnson, a pediatrician at Loyola University Health...

SATURDAY, Feb. 4 -- Winter weather can be challenging for some seniors, especially those with mobility or other health issues. But planning ahead, and enlisting the help of adult children, neighbors or caregivers when needed, can help seniors stay...

SATURDAY, Feb. 4 -- All the food and beverages served at Super Bowl parties can make it a challenging day for people who made a New Year's resolution to lose weight. "We know January is the start of lots of new diets. But, then February starts and...

FRIDAY, Feb. 3 -- Extended synaptic development may explain why humans are intellectually superior to primates, a new study suggests. During the first few years of life, human babies' mental abilities continue to develop and absorb information and...

FRIDAY, Feb. 3 -- Breast-feeding is associated with improved lung function in school-age children, particularly those with asthmatic mothers, a new study says. Swiss and U.K. researchers analyzed data from nearly 1,500 U.K. children who were born...

FRIDAY, Feb. 3 -- Areas in the United States where people have the highest risk of contracting Lyme disease are pinpointed in a new map created by the U.S. Centers for Disease Control and Prevention. Lyme disease is one of the most rapidly emerging...

FRIDAY, Feb. 3 -- Diabetes is associated with hearing loss in women, especially if the blood sugar disease isn't well-controlled, new research indicates. The study, done by researchers at Henry Ford Hospital in Detroit, examined the medical records...

FRIDAY, Feb. 3 -- People who start using hard drugs -- such as cocaine, opiates and amphetamines -- as young adults and continue to use them into their 50s have a fivefold increased risk of early death, researchers report. The finding is from an...

FRIDAY, Feb. 3 -- Soy supplements do not protect women against breast cancer, a new study suggests. The findings are consistent with the results of previous studies that examined the cancer prevention benefits of the dietary supplements, said lead...

FRIDAY, Feb. 3 -- A major head-to-head trial finds that aspirin is equally as good as warfarin in preventing stroke and death in heart failure patients. The researchers said that, all things being equal, the findings raise questions about the...

FRIDAY. Feb. 3 -- The babies of women who develop an epidural-related fever while in labor are at greater risk of having problems right at birth, including poor muscle tone, breathing difficulties, low Apgar scores and seizures, a new study...

FRIDAY, Feb. 3 -- Norovirus was the most common culprit responsible for infection outbreaks in U.S. hospitals in 2008 and 2009, new research finds. Researchers analyzed survey results from 822 hospitals regarding their infection outbreaks. About 35...

FRIDAY, Feb. 3 -- People who consume a few alcoholic drinks a day and have a family history of colorectal cancer are at increased risk for developing colon cancer, new research suggests. For the study, researchers in Boston examined data from more...

FRIDAY, Feb. 3 -- A smaller plate won't help you eat less, says a new study that challenges a widely held belief. "Smaller plates are often recommended as a way of controlling intake, but that simply isn't an effective strategy," senior researcher...

FRIDAY, Feb. 3 -- While a clot-busting medication can often help stop a stroke in its tracks if it's given promptly, a new study finds that a high number of stroke victims continue to fail to get to the emergency room quickly enough to get the...

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay: Sibling Study Suggests Drug Addiction Is 'Hard Wired' Some people have brain abnormalities that make them "hard wired" for drug addiction, a...

FRIDAY, Feb. 3 -- Depression can be a tough condition to diagnose accurately, but new research suggests that someday a blood test might help. It's not clear how much the test might cost, and it needs more stringent validation before it will be...

FRIDAY, Feb. 3 -- Malaria killed 1.2 million people worldwide in 2010, a figure nearly double other estimates, a new study says. The researchers also said that although most malaria deaths occur in very young children, 42 percent of deaths occurred...

FRIDAY, Feb. 3 -- A series of specific "yes" or "no" questions could help doctors distinguish between people who have normal memory loss that comes with age and those with a condition known as amnestic mild cognitive impairment, according to a new...