when i eat nuts i break out in cold sores canker sores and neck rash. is this a common reaction?
there are many potential mechanisms by which food may cause symptoms. allergic reactions are caused by allergic antibodies leading to immediate hypersensitivity reactions. nut allergy typically causes itching lip/tongue swelling nausea vomiting lightheadedness flushing and/or rash. the rash is usually hives (welts) but some develop other types of skin eruptions. ulcers in the mouth is an unusual manifestation. make a list of all the foods that cause the symptoms timecourse of development of symptoms in relationship to eating the food so your doctor/allergic can further investigate.