Q: Is “margarita burn” really a thing?
A: Absolutely. Despite the name, it has nothing to do with the alcohol. “Margarita burn” is the nickname for a skin reaction that can happen when lime juice gets on your skin and is exposed to the sun.
The medical term is phytophotodermatitis. Certain plants, especially limes, contain natural chemicals that become activated by sunlight. If the juice stays on your skin, it can lead to redness, burning, blisters and, in many cases, dark patches called hyperpigmentation that can take months to years to fade. This reaction can happen to anyone exposed and is not considered an allergy.
This is most common during the summer when people are grilling, making drinks or spending time at the pool or lake. Limes are the best-known culprit, but lemons, celery, parsley and even figs, among many other plants and citrus fruits, can cause the same reaction.