Despite comprehensive testing, doctors are unable to determine the cause of chronic hives 80 to 90 percent of the time. The good news is chronic hives is less difficult to manage now compared to 20 years ago. The key is knowing your trigger points.

For people with food allergies, restaurant dining often means using a number of strategies to avoid a life-threatening allergic reaction called anaphylaxis.

Some chronic hives patients go through years of hopping from one doctor to another, searching for the cause of their recurring welts, itching, and/or swelling.

While some people with chronic hives will never know why they're affected, seeing an allergist is the best way to find a treatment.

Can certain foods trigger a chronic hive flare-up? Can a low-histamine diet relieve symptoms? Studies render different results. Here's a succinct summary of the research.

Kids with allergies have a lower risk for complicated appendicitis, which sometimes requires multiple surgeries and longer hospital stays, according to a study.

An allergic reaction to alpha-gal, a complex sugar found in red meat, caused by a Lone Star tick bite is now the most common known cause of anaphylaxis.

People who are allergic to penicillin are often prescribed much stronger antibiotics, increasing antibiotic resistance and their risk for serious drug-resistant infections, but fewer than 1 percent of people believed to be allergic to penicillin are tested.

Research suggests that such red meat allergies, sometimes caused by a tick bite, increase plaque buildup in arteries and can increase the risk for heart disease.

Researchers at King’s College London in England have developed a new blood test to diagnose peanut allergies that may be safer, more accurate, and less expensive than existing tests.