(HealthDay News) -- Though swimming is a low-impact aerobic exercise, it's important to protect yourself from injury.

(HealthDay News) -- Cosmetic products often contain fragrances and preservatives, which could cause skin problems and other side effects among some users.

WEDNESDAY, July 20 (HealthDay News) -- Liars can control certain facial expressions when facing scrutiny, but they can't suppress them completely or every time, a new study shows.

WEDNESDAY, July 20 (HealthDay News) -- Inherited forms of Alzheimer's disease may be detectable up to two decades before problems with memory and thinking develop, according to new research.

WEDNESDAY, July 20 (HealthDay News) -- The number of surgical errors at VA medical centers is on the decline, a new study finds.

WEDNESDAY, July 20 (HealthDay News) -- The behavior of surgeons in the operating room affects more than their patients' health, new research indicates.

WEDNESDAY, July 20 (HealthDay News) -- Premature infants are at greater risk for certain psychiatric disorders as teenagers, including attention deficit hyperactivity and depression, a new study suggests.

WEDNESDAY, July 20 (HealthDay News) -- Personality traits may play key roles in body weight, according to a new U.S. study.

WEDNESDAY, July 20 (HealthDay News)-- An experimental drug for treating Alzheimer's disease that previously showed troubling side effects may actually be safe in the long run, researchers report.

TUESDAY, July 19 (HealthDay News) -- People with heart disease who stop taking their daily low-dose aspirin may put themselves at a greater risk of having a heart attack, a new study finds.

WEDNESDAY, July 20 (HealthDay News) -- A new international survey reveals that many people view Alzheimer's disease as a major health threat, fearing its onset nearly as much as they do cancer.

WEDNESDAY, July 20 (HealthDay News) -- High-tech helmets worn by some U.S. high school football players can quantify the force of impact, offering new insight into head and spine injuries.

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

WEDNESDAY, July 20 (HealthDay News) -- The meteorological monster -- dubbed a "heat dome" by weather experts -- that has wilted much of the United States from the Southwest to the Ohio Valley for days, pushed into the Northeast Wednesday, bearing oppressive humidity, temperatures in the high 90s and heat indices surpassing 100 degrees.

WEDNESDAY, July 20 (HealthDay News) -- Psoriasis and eczema both cause red, scaly skin rashes, but the similarities between the two common, distressing conditions typically end there.

WEDNESDAY, July 20 (HealthDay News) -- Tall folks may be more likely than shorter people to develop cancer, new British research says.

WEDNESDAY, July 20 (HealthDay News) -- The race to develop the $1,000 genome test may be heating up. New technology promises to cut costs while speeding the amount of time it takes to decipher all of your genes and potentially provide a personalized report of health risks and possible therapies, a new report says.

WEDNESDAY, July 20 (HealthDay News) -- Some U.S. soldiers returning from Iraq and Afghanistan are suffering unexplained breathing problems that may be related to exposure to unknown toxins, a new study indicates.

WEDNESDAY, July 20 (HealthDay News) -- The value of annual mammograms for women in their 40s -- the topic of a lingering debate among health policy and advocacy groups -- has drawn resounding support from the nation's largest group of obstetricians/gynecologists.

WEDNESDAY, July 20 (HealthDay News) -- In a long-awaited move, the U.S. Food and Drug Administration late Wednesday approved the blood thinner Brilinta (ticagrelor) for use in patients with acute coronary syndromes, to help lower their odds for heart attack and death.