The skin is often very sensitive with Lupus. Added to this is the many different rashes that we suffer from. However, have you exposed your skin to the sun at all? Our skin is extremely sensitive to the sun and any exposure can cause unwanted symptoms as well as exacerbation of the disease.
My skin is sensitive and burns due to my Fibromyalgia. I've found that cool water (and even ice packs) help to relieve the sensation.
Perhaps someone else will be along who has your particular symptom and who can be a bit more helpful.
Peace and Blessings
Look For The Good and Praise It!