SUNDAY, April 22 (HealthDay News) -- Tick season has started earlier than normal due to the mild winter, which means hikers, gardeners and others who love the outdoors should take precautions to prevent becoming a meal for ticks, an expert says.

SUNDAY, April 22 (HealthDay News) -- That "brain freeze" headache you experience when eating ice cream or other cold foods may be caused by a sudden change in brain blood flow, researchers report.

FRIDAY, April 20 (HealthDay News) -- The U.S. government is giving the go-ahead for publication of two controversial studies into the H5N1 avian (bird) flu virus, a top federal health official announced Friday.