(HealthDay News) -- Rebound headaches are sometimes called medication overuse headaches. They tend to occur almost every day, and are commonly caused by taking too much pain medication.

(HealthDay News) -- Osteopenia is the medical term for low bone density. A diagnosis indicates you may be at risk of a more severe form of thinning bones called osteoporosis, according to the National Osteoporosis Foundation.

FRIDAY, Oct. 29 (HealthDay News) -- Old age seems to sneak up on pets just as it does in people.

FRIDAY, Oct. 29 (HealthDay News) -- Canadian researchers say they've noticed a disturbing trend: Cancer doctors ordering unnecessary blood transfusions so that seriously ill patients can qualify for drug trials.

THURSDAY, Oct. 28 (HealthDay News) -- Elderly kidney failure patients in the United States are twice as likely to get a kidney transplant as they were in the mid-1990s, although the likelihood is still low, a new studyfinds.

FRIDAY, Oct. 29 (HealthDay News) -- An increasing number of American children require treatment for serious and chronic bouts of constipation, according to experts.

FRIDAY, Oct. 29 (HealthDay News) -- Positive factors such as meaningful relationships with others and a sense of purpose can help reduce the negative health impacts of having less schooling, a new study suggests.

FRIDAY, Oct. 29 (HealthDay News) -- Lack of knowledge and fear are common among parents of children with the drug-resistant staph bacteria called MRSA (methicillin-resistant Staphylococcus aureus), says a new study.

FRIDAY, Oct. 29 (HealthDay News) -- Scented consumer products such as air fresheners, laundry detergents, deodorants and shampoos give off many chemicals, including some that are classified as toxic, but a new study finds that these chemicals often aren't listed on the products' labels.

THURSDAY, Oct. 28 (HealthDay News) -- Less than 63 percent of American men under the age of 30 have visited a primary-care physician in the past year, compared with more than 85 percent of men 60 or older, a new men's health survey shows.

FRIDAY, Oct. 29 (HealthDay News) -- As if having psoriasis wasn't difficult enough, nearly half of kids with the skin problem have been bullied at least once in the past six months, according to a new survey.

FRIDAY, Oct. 29 (HealthDay News) -- Research in mice reveals that a small number of cancer cells escape from chemotherapy by hiding out in the thymus, the organ where immune cells mature.

FRIDAY, Oct. 29 (HealthDay News) -- Not turning the clocks back an hour in the fall would offer a simple way to improve people's health and well-being, according to an English expert.

FRIDAY, Oct. 29 (HealthDay News) -- More than half of the surrogate decision makers for incapacitated or critically ill patients want to have full control over life-support choices and not share or yield that power to doctors, finds a new study.

FRIDAY, Oct. 29 (HealthDay News) -- It's a fatal attraction: puddles of sweet-tasting antifreeze on driveways and garage floors are hard for thirsty pets to resist.

FRIDAY, Oct. 29 -- A good marriage helps people with rheumatoid arthritis enjoy better quality of life and experience less pain, a new study suggests.

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

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