Hives is a skin rash triggered by an allergen, often a food, a chemical substance or a drug. It is characterized by widespread itching and red-white, raised bumps, similar to the effect of a nettle sting. It appears without warning. Some triggering factors have been identified, such as chemical salicylate found in aspirin and many common foods. BICOM bioresonance is capable of detecting the causes of the allergy, making it easier to control.