(HealthDay News) -- Stress fractures are common overuse injuries, and may take lots of time to fully heal.

(HealthDay News) -- Parents who give their kids healthy meals at home aren't doing their children any favors by feeding them fatty restaurant fare.

FRIDAY, Oct. 21 (HealthDay News) -- Older patients drive more safely than younger patients after having outpatient surgery and receiving a short-acting anesthetic, according to a new study.

FRIDAY, Oct. 21 (HealthDay News) -- Children younger than age 3 who have blocked tear ducts are at greater risk for amblyopia, or "lazy eye" -- a condition that could result in permanent vision loss if not treated early enough, researchers have found.

FRIDAY, Oct. 21 (HealthDay News) -- Inflammation and enlargement of adenoids in children does not appear to be caused by bacteria associated with stomach inflammation and ulcers, researchers report.

FRIDAY, Oct. 21 (HealthDay News) -- Brawls on the ice are a staple of professional ice hockey games, but are they as vicious as they look? A new study suggests that few punches thrown during National Hockey League games end in significant injury.

FRIDAY, Oct. 21 (HealthDay News) -- The way the human circadian clock sets itself may explain why jet lag tends to affect people more severely when they're flying west to east compared to the other direction, a new animal study indicates.

FRIDAY, Oct. 21 (HealthDay News) -- Children with specific gene variants respond better to the drug methylphenidate (Ritalin, Concerta), which is widely used to treat attention-deficit hyperactivity disorder (ADHD), a new study says.

FRIDAY, Oct. 21 (HealthDay News) -- Seeing someone else being caressed causes your brain to react as strongly as if you were being caressed, researchers have found.

FRIDAY, Oct. 21 (HealthDay News) -- More than one in four children in the United States has been exposed to physical violence between their parents at home at some time in their lives, and one in nine has been exposed to this type of violence within the past year, a new study says.

FRIDAY, Oct. 21 (HealthDay News) -- Elevated levels of hormones increase breast cancer risk in postmenopausal women, and as the number of different elevated hormones rises, so does the risk, a new study has found.

THURSDAY, Oct. 20 (HealthDay News) -- The 5 billion people worldwide who chat away on cell phones shouldn't worry about an increased risk of brain cancer, new Danish research contends.

FRIDAY Oct. 21 (HealthDay News) -- Young adults who were born very prematurely have higher blood pressure and more fat despite a normal body weight, both signs that may point to a heightened risk of health problems such as heart disease and diabetes later in life, a new study finds.

FRIDAY, Oct. 21 (HealthDay News) -- The breast cancer drug letrozole, marketed as Femara, may be more effective than tamoxifen at preventing the return of breast cancer and improving survival among older women with hormone-sensitive breast cancers, a new study reports.

FRIDAY, Oct. 21 (HealthDay News) -- Blacks have a higher rate of multiple, large-joint osteoarthritis and knee osteoarthritis than whites do, a new study finds.

FRIDAY, Oct. 21 (HealthDay News) -- Textbooks have long listed the centers of male hormone production as the testes and adrenal glands. But those textbooks might need revising if the results of a new study, showing hormone production in the penis itself, turn out to be true.

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