(HealthDay News) -- If you have trouble completing everyday tasks because you can't see well enough -- even while wearing prescription glasses -- you may have what the National Eye Institute calls "low vision."

(HealthDay News) -- Canker sores are painful ulcers that occur in the mouth. They may be yellow or white in appearance, while the surrounding tissue usually is red.

TUESDAY, Aug. 16 (HealthDay News) -- Scientists who identified significant differences in male and female metabolism say there's a need for gender-specific drug therapies for some diseases.

TUESDAY, Aug. 16 (HealthDay News) -- Black women are more likely to have two or more children and are less likely to breast-feed, putting them at greater risk of developing a difficult-to-treat type of breast cancer, according to a new study.

TUESDAY, Aug. 16 (HealthDay News) -- The risk of deep vein thrombosis -- a sometimes deadly blood clot that can form in a deep vein after general surgery -- is low when preventive measures such as anti-clotting drugs are used, researchers say.

TUESDAY, Aug. 16 (HealthDay News) -- Many women in the United States continue to use a Chinese weight-loss supplement that's been recalled due to dangerous ingredients, a new study indicates.

MONDAY, Aug. 15 (HealthDay News) -- Just 15 minutes of physical activity a day can reduce your risk of death by 14 percent and increase your life expectancy by three years, a new study suggests.

MONDAY, Aug. 15 (HealthDay News) -- Teens of mothers who were overweight or obese when they became pregnant may be at increased risk for asthma symptoms, according to a new study.

MONDAY, Aug. 15 (HealthDay News) -- Spending your days in front of the television may contribute to a shortened lifespan, a new study suggests.

TUESDAY, Aug. 16 (HealthDay News) -- There was a dramatic increase in the number of children's flu-related hospital stays in the United States between 2000 and 2009, a federal agency says.

TUESDAY, Aug. 16 (HealthDay News) -- The amount of hidden fat that collects around the heart may be a stronger indicator of cardiac disease risk than a bulging waistline or flabby thighs, a new study reports.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

TUESDAY, Aug. 16 (HealthDay News) -- In what may be a diagnostic advance, U.S. and Swedish researchers have linked five inherited genetic mutations to the development of a particularly aggressive and deadly form of prostate cancer.

TUESDAY, Aug. 16 (HealthDay News) -- Drinking moderate amounts of alcohol, especially wine, may lower the risk of dementia, according to a review of previous research.

TUESDAY, Aug. 16 (HealthDay News) -- Some thyroid cancer patients with early disease may be given radioactive iodine unnecessarily, while others with more advanced tumors who should get the treatment don't, a new study suggests.

TUESDAY, Aug. 16 (HealthDay News) -- For some gout patients afflicted with a particularly severe, crippling form of the disease who find standard treatments either intolerable or ineffective, a recently approved alternative appears to afford relief.

TUESDAY, Aug. 16 (HealthDay News) -- The manic episodes experienced by those with bipolar disorder are better controlled by antipsychotic drugs than mood stabilizers, a new, large study suggests.

TUESDAY, Aug. 16 (HealthDay News) -- Almost half of all bladder cancers can be attributed to smoking cigarettes, and the risk of bladder cancer has increased significantly for smokers in the past three decades, a new study finds.

TUESDAY, Aug. 16 (HealthDay News) -- HIV/AIDS experts gathering in Atlanta this week expressed growing concerns over a rise in rates of HIV infection among the nation's poor and minorities.