Thank you for your query.
What you describe cannot be shingles
. It must be a skin infection
which may be spreading. Without having a look it may not be possible to give a definite advice. You should consult a doctor for it who will put you on an antibiotic. In the interim you can apply potassium permanganate compresses but do not use a steroid
cream till the diagnosis is confirmed.
I hope I have answered your query to your satisfaction.
Wishing you an early recovery.
Rajiv K Khandelwal