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I have had intensely painful lips for about 2 months. I was taking antibiotics for a persistent UTI around when the symptoms started. my lips feel as though they are burning, and also stinging like tiny needles. mostly they are strangely smooth although occasionally they blister but not very often. there is a tiny white line on the bottom of my upper lip. a dermatologist prescribed me magic mouthwash and a steroid ointment which seemed to make things worse. i then was given nystatin which improved things a little but not entirely. I have been off of that for 3 days and it is hard to talk or even eat. I haven't changed anything that could be an allergy