(HealthDay News) -- Asthma can affect your sleep, as symptoms often worsen at night.

(HealthDay News) -- A mouthguard helps prevent damage to your teeth and mouth during sports or other physical activity.

FRIDAY, Jan. 25 (HealthDay News) -- They say money can't buy happiness, and a new study suggests that's true for even the most materialistic.

FRIDAY, Jan. 25 (HealthDay News) -- Weight-loss surgery in extremely obese teens helps reverse heart abnormalities thought to be associated with severe obesity, a small new study finds.

FRIDAY, Jan. 25 (HealthDay News) -- Tough economic times can lead people to eat much more than they normally would, a recent study finds.

FRIDAY, Jan. 25 (HealthDay News) -- Folic acid supplements do not affect people's risk for cancer, according to a large new review.

FRIDAY, Jan. 25 (HealthDay News) -- Lightning is associated with an increased risk of headaches and migraines, a new study suggests.

FRIDAY, Jan. 25 (HealthDay News) -- Children taking the common painkillers known as nonsteroidal anti-inflammatory drugs may be at risk for acute kidney damage, particularly when the kids are dehydrated, a new study finds.

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

FRIDAY, Jan. 25 (HealthDay News) -- Bisexual women in the United States are more likely to suffer from domestic violence than either lesbian or heterosexual women, a new government report shows.

FRIDAY, Jan. 25 (HealthDay News) -- While flu activity remains high across the United States, there are signs that the number of infections may be leveling off, federal health officials reported Friday.

FRIDAY, Jan. 25 (HealthDay News) -- The drug Oxytrol has been approved by the U.S. Food and Drug Administration as the first over-the-counter treatment for women 18 and older with overactive bladder.