(HealthDay News) -- Straining the eyes while watching television or working on the computer can trigger a nasty headache. But so can your posture, stress and other factors.

(HealthDay News) -- Lactose is a sugar found in milk and other dairy products that some people have difficulty digesting.

WEDNESDAY, Aug. 11 (HealthDay News) -- Brain regions that may play a role in the development of childhood anxiety have been pinpointed by U.S. researchers.

WEDNESDAY, Aug. 11 (HealthDay News) -- Fewer cycles of chemotherapy and lower dosages of radiation may work just as well as more intensive treatment for early-stage Hodgkin's lymphoma, a new study suggests.

WEDNESDAY, Aug. 11 (HealthDay News) -- The vast majority of medical school students believe that technology in the form of virtual reality exercises could help them to develop the skills they will need as future doctors, a new survey reveals.

WEDNESDAY, Aug. 11 (HealthDay News) -- In what is described as the most comprehensive genetic analysis of dogs to date, researchers have found that a mere handful of genetic regions account for the majority of differences in physical traits among canine breeds.

WEDNESDAY, Aug. 11 (HealthDay News) -- A new study appears to dash hopes that the psychiatric drug lithium can benefit patients with amyotrophic lateral sclerosis (ALS).

WEDNESDAY, Aug. 11 (HealthDay News) -- A natural mechanism that may help prevent the development of AIDS in sooty mangabey monkeys has been discovered by scientists.

WEDNESDAY, Aug. 11 (HealthDay News) -- White children and those in poor families are more likely to have repeated ear infections than other children, U.S. researchers have found.

TUESDAY, Aug. 10 (HealthDay News) -- Just a small drop in the outdoor temperature can translate into a heightened risk for heart attack in the following month, new British research indicates.

WEDNESDAY, Aug. 11 (HealthDay News) -- Males account for the majority of U.S. hospital emergency visits involving underage drinkers, says a federal government report.

WEDNESDAY, Aug. 11 (HealthDay News) -- Doctors who performed a stomach reduction through a patient's mouth say it's the first time this type of surgery has been done in the United States.

WEDNESDAY, Aug. 11 (HealthDay News) -- Menstrual cramps are often dismissed as a mere nuisance, but new research suggests the monthly misery may be altering women's brains.

WEDNESDAY, Aug. 11 (HealthDay News) -- A gene that makes bacteria resistant to almost all antibiotics has appeared in Pakistan, Bangladesh and India, researchers have found.

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

WEDNESDAY, Aug. 11 (HealthDay News) -- A debilitating and usually fatal skin disorder may be treated by bone marrow stem cell transplant, a new study finds.

WEDNESDAY, Aug. 11 (HealthDay News) -- Recent advances in understanding the cause of severe peptic ulcers, along with better treatments, may be driving a decline in their incidence, a new study indicates.

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

WEDNESDAY, Aug. 11 (HealthDay News) -- Scientists excavating in Ethiopia have come across bones from a cow-sized animal and an antelope, probably eaten by early human ancestors, that seem to have been dug out by tools -- probably to get the nutritious marrow out.