food allergies

If you are bitten by a Lone Star tick, you could develop an unusual allergy to red meat. And as this tick's territory spreads beyond the Southeast, the allergy seems to be spreading with it.

A growing number of start-ups are offering at-home tests that let you check your thyroid, your fertility, even food sensitivities. But some doctors view the tests with skepticism.

Pollen allergies can trigger reactions to fruits and vegetables. The condition — known as oral allergy syndrome — can come on suddenly and often goes undiagnosed.

Despite assumptions that peanut and other allergies are becoming more common in the U.S., experts say they just don't know. One challenge: Symptoms can be misinterpreted and diagnosis isn't easy.

A second big study affirms new thinking: Exposing high-risk kids to peanuts beginning in infancy reduces the chance of developing a peanut allergy. This peanut tolerance holds up as kids get older.