Thanks so much for your kind reply! It really has been a frustrating and painful thing. I just left it alone for a month while I was traveling but it didn't change at all.
I have lots of sensitivities so I don't use anything with scents or perfumes or additives. I don't have allergies but I've had reactions to ibuprofen, CT contrast, lidocaine, sulfa drugs, and raloxifene (an osteoporosis med that caused hypocalcemia complete with seizures, pain and constant nausea.) I am mostly gluten and dairy free due to an autoinflammatory disease (sarcoidosis, which my derm swears is not the cause of my skin condition.)

For the past two or three years, I've been taking a small dose of gabapentin (100mg in the am, 200mg at night) for hot flashes & night sweats that have afflicted me for 20 years. I've read a couple of patient reports linking gabapentin to lichen planus so maybe? My biopsy results didn't show much for eosinophils but did say the LP could possibly be a drug reaction so I'm thinking the next step is to try eliminating the gabapentin and see what happens. Which of course means returning to sleepless nights and sweaty days, sigh. It's always something!