a day after a drank a lot of lemon juice at a cocktail party, a red raised itchy rash started on my arms and 3 weeks later I have it over my whole body. Is it possible the lemon juice triggered it? I have consulted a dermatologist and he now sent a biopsy to be tested.
Yes. Allergy to lemons generally mean allergy to citrus and possibly citric acid. You can test the theory with oranges, grapefruits, etc. Though one would think that after three weeks having not ingested any more, the reaction would have dissipated.
Food allergies largely go undiagnosed. My son was referred for surgery (which I thankfully declined) because the doctors didn't take the time to find out all his problems were related to food allergies (cinnamon, citrus, soy, and more)... even an allergist did not mention the possibility.
After eliminating all the allergens, my sons health problems magically vanished.