(HealthDay News) -- Most people are allergic to poison ivy, a three-leafed plant found in most areas of the United States. It harbors an oil that bonds to any skin that the oil touches, causing a red, itchy rash.

(HealthDay News) -- Carpal tunnel syndrome occurs from repetitive use of the wrists, including activities such as typing on a computer keyboard.

THURSDAY, March 3 (HealthDay News) -- The brain's so-called reward center actually responds to both good and bad experiences, even experiences causing fear, finds a new study in mice.

THURSDAY, March 3 (HealthDay News) -- A new Australian study finds that babies who sleep on their stomachs -- a position thought to pose a risk for SIDS -- have lower levels of oxygen in their brains than those who sleep on their backs.

THURSDAY, March 3 (HealthDay News) -- Bunions, a common but painful deformity of the foot, are more likely to develop in older people and women, a new study has found.

THURSDAY, March 3 (HealthDay News) -- Staring into the enticing glow of your computer hour after hour may well have its benefits, but a downside to all that screen time can include dry, tired eyes, blurred vision, fatigue and headaches.

WEDNESDAY, March 2 (HealthDay News) -- The new chemotherapy drug eribulin extends the lives of metastatic breast cancer patients who have received extensive treatment, according to a new study.

THURSDAY, March 3 (HealthDay News) -- Exercise may help kidney transplant patients live longer, according to a new study.

THURSDAY, March 3 (HealthDay News) -- About a third of cancer patients taking opioid painkillers experience cognitive problems such as confusion, disorientation and forgetfulness, a new study finds.

THURSDAY, March 3 (HealthDay News) -- Obese people are already at risk for a range of health issues, but their problems can be made worse if they feel they are being discriminated against because of their weight, researchers say.

THURSDAY, March 3 (HealthDay News) -- New findings about brain rhythms could lead to the development of improved sleep treatments, a new study suggests.

THURSDAY, March 3 (HealthDay News) -- Just like humans, chimpanzees mimic the laughter of others in order to strengthen social bonds, say researchers who studied 59 chimpanzees living in four groups in a sanctuary in Zambia.

THURSDAY, March 3 (HealthDay News) -- More young people are waiting to have sex, and more women than men are engaging in same-sex encounters, according to a new report detailing Americans' evolving sexual behaviors and preferences.

THURSDAY, March 3 (HealthDay News) -- An analysis of breast tissue may help doctors better predict outcomes for women with breast cancer, a new study reports.

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

THURSDAY, March 3 (HealthDay News) -- Minorities have a significantly lower chance of getting a kidney transplant than whites do, claims a new study that calls for changes in the formula used to decide who gets which donated organs.

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

THURSDAY, March 3 (HealthDay News) -- More than one-third of Americans routinely sleep fewer than seven hours a night, which affects their concentration and general health, new government research shows.