Never Mind. I Thought Itwas FreeI Have A Huge Raised

Never mind. I thought itwas freeI have a huge raised itchy painful blister on palm if my had next to my wrist. Has shingles symptoms and started as very small shingle like blister. Keeps growing been to 2 drs and they are stumped. Help it is so painful. Did bacteria culture no infection. Waiting on viral culture. Been there for 8 days