Sunny Disposition May Shield You From Heart Problems

MONDAY, July 22 (HealthDay News) -- Being cheerful and optimistic may greatly reduce your risk of heart problems, according to a new study.

Health Tip: Show Genuine Interest in Your Child

(HealthDay News) -- Your child must learn to relate to his or her parents before fostering relationships with other children.

Health Tip: If You Spill Mercury

(HealthDay News) -- If you drop and break a thermometer that contains mercury, it's important to minimize exposure to the toxic contents.

Making Eye Donation Easier Could Help Meet Research Demand

MONDAY, July 22 (HealthDay News) -- Many people are willing to donate their eyes to research, but don't know how, a new study finds.

Moon's Cycle Tied to Heart Surgery Outcomes: Study

MONDAY, July 22 (HealthDay News) -- Scheduled for heart surgery? A new study suggests you might fare better or worse depending on the moon's cycle at the time of the procedure.

'Female' X Chromosome May Play Part in Sperm Production

SUNDAY, July 21 (HealthDay News) -- Researchers have made the surprising finding that the "female" X chromosome may have an important function in sperm production.

Epilepsy Plus Mental Ills Linked to Premature Death, Study Says

MONDAY, July 22 (HealthDay News) -- People with epilepsy are 11 times more likely to die prematurely than people in the general population. And the increased risk of early death is significantly higher among those with mental illnesses, especially depression and alcohol and drug-use disorders, a new study suggests.

Homemade Blowgun Darts Pose Choking Dangers for Teens

MONDAY, July 22 (HealthDay News) -- It seems kids will never stop coming up with creative ways to injure themselves, if the cases of three teen boys and their homemade blowguns are any indication.

TVs Toppling Onto Tots at Alarming Rate, Study Finds

MONDAY, July 22 (HealthDay News) -- Falling television sets continue to be a source of serious injuries to young children, a new study shows.

Health Highlights: July 22, 2013

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