Health Tip: Dealing With Shift Work Fatigue

(HealthDay News) -- Shift work often means staying awake during the late night and early morning, leading to big-time fatigue.

Health Tip: Choosing the Right Toothbrush

(HealthDay News) -- Using the right toothbrush can help you care for your teeth and gums. But it's also important to make sure it's properly cleaned.

Concussion Rates Double Among High School Athletes: Report

THURSDAY, May 15, 2014 (HealthDay News) -- The rate of concussions in U.S. high school athletes more than doubled between 2005 and 2012, new research shows.

Stem Cells Reverse MS-Like Illness in Mice

THURSDAY, May 15, 2014 (HealthDay News) -- Mice disabled by a multiple sclerosis-like condition were able to walk again a few weeks after receiving human neural stem cell transplants, a new study shows.

There May Be Such a Thing as 'Too Much Exercise'

WEDNESDAY, May 14, 2014 (HealthDay News) -- Is there a limit to the benefits of exercise? Two studies suggest that, for certain people, keeping to a moderate physical activity regimen may be best for heart health.

Purposeful Life Might Be a Longer Life

THURSDAY, May 15, 2014 (HealthDay News) -- You may live longer if you feel you have a purpose in life, a new study suggests.

Study Probes Link Between Early Antibiotic Use, Asthma

THURSDAY, May 15, 2014 (HealthDay News) -- Children treated with antibiotics in their first year of life may face more than twice the risk of developing asthma later in life.

Flame Retardants Common in Dust at Child Care Centers: Study

THURSDAY, May 15, 2014 (HealthDay News) -- Hazardous flame retardants are found indoors at U.S. child care centers, which means children at those facilities could be exposed to the chemicals, a new study reveals.

Obesity May Raise Breast Cancer Death Risk for Some Women

THURSDAY, May 15, 2014 (HealthDay News) -- A new study suggests that obesity may raise the risk of dying from early stage breast cancer for some women.

Scientists Get Closer to the Stem Cells That May Drive Cancers

THURSDAY, May 15, 2014 (HealthDay News) -- Although the very concept of cancer stem cells has been controversial, new research provides proof that these distinct types of cells exist in humans.

CDC Urges Anti-HIV Pill for People at High Risk of Infection

WEDNESDAY, May 14, 2014 (HealthDay News) -- People deemed to be at high risk for contracting HIV, the virus that causes AIDS, should take anti-HIV medicines that seem to cut transmission risk, the U.S. Centers for Disease Control and Prevention announced Wednesday.

Health Highlights: May 15, 2014

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