(HealthDay News) -- A heart murmur is an extra or unusual sound made by the heart as it beats.

(HealthDay News) -- Nosebleeds are common during childhood, and don't necessarily indicate danger, or that something is wrong.

MONDAY, Nov. 26 (HealthDay News) -- For middle-aged adults trying to protect their knee health, it may be best to avoid extreme ends of the exercise spectrum, such as too much high-impact exercise or too little physical activity, researchers have found.

SUNDAY, Nov. 25 (HealthDay News) -- Reading, writing and playing cards and board games may be more than just fun pastimes, they may also help aging brains stay healthy, researchers say.

MONDAY, Nov. 26 (HealthDay News) -- Inflatable bounce houses and moonwalks are springboards for childhood fun, but they're also the source of an alarming number of children's injuries, a new report warns.

MONDAY, Nov. 26 (HealthDay News) -- Doctors should let their teenage patients know about emergency contraception, such as Plan B, and write them a prescription for it if they are sexually active, according to a new policy statement from the American Academy of Pediatrics.

MONDAY, Nov. 26 (HealthDay News) -- Alzheimer's disease may look and act differently in men and women, new research suggests.

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

MONDAY, Nov. 26 (HealthDay News) -- Because of new chemical formulations, prescription drugs that interact badly with grapefruit have more than doubled in number since 2008, yet many doctors seem unaware of this, Canadian researchers report.