FRIDAY, May 24 (HealthDay News) -- We've all seen them: the surfers who race to the beach when a hurricane hits, the guy who decides to ride out the storm in his overmatched boat, the tornado chasers who fearlessly steer their cars alongside a scary-looking funnel cloud.

FRIDAY, May 24 (HealthDay News) -- Nearly three out of four pregnant women experience bowel problems such as constipation and diarrhea, but these issues don't significantly affect their quality of life, a new study finds.

FRIDAY, May 24 (HealthDay News) -- As a world-class golfer, Stacy Lewis' accomplishments are remarkable. But it was a physical challenge in her childhood that defined her ascent to the top of her sport.

(HealthDay News) -- Running, walking or hiking trails can be a fun way to enjoy the great outdoors and get some exercise.

(HealthDay News) -- Allergy shots, also called immunotherapy, can help allergy sufferers control symptoms and find relief.

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

THURSDAY, May 23 (HealthDay News) -- Certain statins -- the widely used cholesterol-lowering drugs -- may increase your chances of developing type 2 diabetes, a new study suggests.

THURSDAY, May 23 (HealthDay News) -- People who eat at fast-food restaurants are consuming significantly more calories than they realize -- and teens are the worst offenders, a new study found.

THURSDAY, May 23 (HealthDay News) -- A modified version of the polio virus might one day help fight brain tumors, preliminary research suggests.

THURSDAY, May 23 (HealthDay News) -- Symptoms of borderline personality disorder often mimic traits of other psychiatric disorders, complicating diagnosis and treatment. But researchers in Canada say they have identified a characteristic that may be unique to borderline personality disorder: a tendency to misinterpret emotions expressed by the face.

THURSDAY, May 23 (HealthDay News) -- Glucosamine supplements that millions of Americans take to help treat hip and knee osteoarthritis may have an unexpected side effect: They may increase risk for developing glaucoma, a small new study of older adults suggests.

THURSDAY, May 23 (HealthDay News) -- Type 2 diabetes is more aggressive in children than adults, with signs of serious complications seen just a few years after diagnosis, new research finds.

THURSDAY, May 23 (HealthDay News) -- Although a study in 2012 suggested a cancer drug could reverse the thinking and memory problems associated with Alzheimer's disease, three groups of researchers now say they have been unable to duplicate those findings.

THURSDAY, May 23 (HealthDay News) -- The sensation of itching is hardwired into the nervous system and can be traced back to a small molecule released in the spinal cord, according to a new study in mice.

THURSDAY, May 23 (HealthDay News) -- A shortage of a critical tuberculosis drug has hampered the efforts of health departments across the United States to contain the spread of the highly infectious lung disease, federal officials report.

THURSDAY, May 23 (HealthDay News) -- Heavy consumption of diet soda can damage teeth as badly as methamphetamine or crack cocaine, a new study contends.

THURSDAY, May 23 (HealthDay News) -- Statins are proven drugs taken by millions to lower their cholesterol, but the medications also could hamper heart patients' ability to improve their cardiovascular health through exercise, researchers say.

THURSDAY, May 23 (HealthDay News) -- Schools should ensure that kids get at least one hour of physical activity each day to support their health and boost performance in school, according to a new report.

THURSDAY, May 23 (HealthDay News) -- Mild to moderate iodine deficiency during pregnancy may have a negative long-term impact on children's brain development, British researchers report.

THURSDAY, May 23 (HealthDay News) -- People who suffer from frequent heartburn may be at increased risk for cancers of the throat and vocal cords even if they don't smoke or drink alcohol, a new study says.

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