(HealthDay News) -- Too much sun can permanently damage your skin and increases your risk of developing skin cancer.

(HealthDay News) -- The heel is the largest of the human foot's 26 bones. And it's no stranger to strain and pain.

WEDNESDAY, March 21 (HealthDay News) -- Seniors' memory and thinking skills decline more rapidly than normal after they've been hospitalized, a new study finds.

WEDNESDAY, March 21 (HealthDay News) -- Pregnancy is safe for women with estrogen receptor-positive breast cancer, according to a new study.

WEDNESDAY, March 21 (HealthDay News) -- High-fat meals might boost inflammation in people with type 2 diabetes, a new study says.

WEDNESDAY, March 21 (HealthDay News) -- When used in tandem with standard Western treatments, alternative therapies such as acupuncture, acupressure and dietary changes may spell significant relief for patients battling chronic sinusitis, a new pilot study suggests.

WEDNESDAY, March 21 (HealthDay News) -- Most sinus infections are caused by viruses and should not be treated with antibiotics, which target bacteria and are useless against viruses, new expert guidelines state.

TUESDAY, March 20 (HealthDay News) -- Calculating the difference in blood pressure readings taken from the left and right arms might help predict a patient's odds of dying from heart disease, a new study suggests.

WEDNESDAY, March 21 (HealthDay News) -- Strong smells lead people to take smaller bites of food, which suggests that aroma might be used as a way to control portion size, new research suggests.

TUESDAY, March 20 (HealthDay News) -- Aspirin, a popular weapon in the war against heart attacks, may also play a role in cancer prevention and treatment, three new British studies suggest.

WEDNESDAY, March 21 (HealthDay News) -- In many parts of the United States, the infrastructure and systems to deliver health care during or after catastrophic disasters such as major earthquakes or widespread disease outbreaks are rudimentary at best, experts warn.

WEDNESDAY, March 21 (HealthDay News) -- Two long-term studies from the Netherlands suggest that routine mammography screening does save women's lives.

WEDNESDAY, March 21 (HealthDay News) -- Men worried about encroaching baldness, take heart: A genetic analysis of tissue taken from both bald and hairier spots on men's scalps has identified a protein involved in male pattern hair loss.

WEDNESDAY, March 21 (HealthDay News) -- A new medication called tenecteplase may be more effective at treating strokes caused by clots in large blood vessels in the brain than the current standard therapy, Australian researchers report.

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

WEDNESDAY, March 21 (HealthDay News) -- Alzheimer's disease and other types of dementia appear to spread through linked nerve cells in the brain, new research indicates.

WEDNESDAY, March 21 (HealthDay News) -- A new blood test may be able to predict a heart attack before it actually happens, the test's developers claim.

WEDNESDAY, March 21 (HealthDay News) -- The costs of the obesity epidemic to the United States and the economic value of curbing it are not captured fully by current methods, according to a new report.

WEDNESDAY, March 21 (HealthDay News) -- A new anti-cholesterol drug appears safe and effective in people already taking statins such as Lipitor, making it a potential addition to statin therapy or an alternative, a preliminary new study suggests.