11 Foods That Soothe a Sore Throat Many fruits, vegetables, and herbs are capable of saving the day with their antioxidant-rich powers and can sometimes help you avoid that trip to the doctor. iStock/Thinkstock
RAST stands for radioallergosorbent test. This is a blood test used to diagnose allergies. Your blood is drawn and a lab will analyze your blood sample for the level of antibodies that cause allergies.
Drugs that contain sulfhydryl can cause unrelated skin reactions, such as a rash or a rare blistering disease of the autoimmune system called pemphigus. An allergy to sulfonamide antibiotics is what most people are referring to when they say they have a sulfur allergy. Symptoms include fever, skin rash, redness, swelling, blistering, hives, joint pain, and (rarely) anaphylaxis. Nonantibiotic sulfonamides are less likely to cause a severe allergic reaction.