Yes, you can use Epsom salt.
Some also find Aveeno bath helps as well.
Given you have Wegener's and I suspect are on immunosupressive therapy, I would also want to make sure you are taking an antiviral medication- acyclovir ( Zovirax) or Valtrex for the shingles. If you are not- please get a prescription from your doctor as soon as possible, as shingles can progress and worsen significantly in immunocompromised patients.
Always ask if you need clarification/more information.
POSITIVE feedback & a BONUS are warmly appreciated. Please note that answers are for information only, do not take the place of an IN PERSON assessment by your doctor,and does not establish a patient-physician relationship.
OK good- I am glad you are on acyclovir.