(HealthDay News) -- When you walk, the joint at the base of the big toe supports a lot of the body's weight. So when bunion forms at that joint and forces the big toe to curve toward the others, it can be quite painful.

(HealthDay News) -- If you're trying to prevent an asthma flare, avoiding things that trigger your breathing problems is a good start.

TUESDAY, April 17 (HealthDay News) -- Mothers with depression may behave in ways that disturb their infants' sleep, according to a new study.

TUESDAY, April 17 (HealthDay News) -- Pregnant women who are overweight and have slightly elevated blood-sugar levels are at increased risk for pregnancy complications, a new study shows.

TUESDAY, April 17 (HealthDay News) -- A once-a-day pill to prevent HIV infection could significantly reduce the spread of the AIDS-causing virus, but would only be cost-effective if limited to men at very high risk for HIV infection, according to a new study.

TUESDAY, April 17 (HealthDay News) -- The ability to make decisions in new situations declines with age, apparently because of changes in the brain's white matter, a new imaging study says.

TUESDAY, April 17 (HealthDay News) -- A group of socioeconomic factors such as education, income and work are better indicators of your chances of living to age 70 than race or geography, a new study shows.

TUESDAY, April 17 (HealthDay News) -- Adults with serious injuries are more likely to survive if they're transported to hospital by helicopter instead of ambulance, researchers report.

TUESDAY, April 17 (HealthDay News) -- Medicare patients who have advanced non-small cell lung cancer appear to get no survival benefit from adding the drug Avastin to standard chemotherapy, researchers from the Dana-Farber Cancer Institute report.

TUESDAY, April 17 (HealthDay News) -- At least one in 10 U.S. adults is estimated to have chronic kidney disease, but whether screening and monitoring people in the earlier stages of the disease provides a benefit just isn't clear, a new review of the available clinical trials revealed.

TUESDAY, April 17 (HealthDay News) -- A new study raises questions about the value of proton therapy, an expensive new kind of radiation treatment, in patients with prostate cancer.

TUESDAY, April 17 (HealthDay News) -- Most people with obsessive-compulsive disorder manage their symptoms through talk therapy and medication. But for some, severe OCD can take over their lives. A few eventually turn to brain surgery, and a new study shows how they fared.

TUESDAY, April 17 (HealthDay News) -- A vaccine made from brain cancer patients' own tumor cells led to a nearly 50 percent improvement in survival times for those stricken with glioblastoma multiforme, the same malignancy that claimed the life of U.S. Sen. Edward Kennedy, a new study suggests.

TUESDAY, April 17 (HealthDay News) -- Researchers have developed a blood test that could one day help diagnose teens with depression.

TUESDAY, April 17 (HealthDay News) -- Patients struggling with moderate to severe heart failure might benefit from testosterone supplementation to boost their ability to exercise, new Canadian research suggests.

TUESDAY, April 17 (HealthDay News) -- When Medicare stops paying for seniors' medications after they enter the Part D "donut hole," the seniors often go without the drugs, even if the medications are essential for heart health, new research shows.

TUESDAY, April 17 (HealthDay News) -- New research adds to the growing pile of scientific strategies aimed at revealing beta-amyloid (protein) plaques, the brain-clogging fragments that have been associated with Alzheimer's disease.

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

TUESDAY, April 17 (HealthDay News) -- Kidney cancer patients who have only the tumor removed, not the entire kidney, have higher survival rates, a new study finds.

TUESDAY, April 17 (HealthDay News) -- The Obama Administration has chosen the middle ground with its new drug control policy, advocating treatment over tough sentencing.