My Dad Is 77 Yrs Old And Had Shingles Back

My Dad is 77 yrs old and had shingles back in June. 3 weeks later, he had a stroke that didn't cause any permanent damage that drs. could find. Then he was feeling ok again and now he is having trouble walking, is very fatigue after doing hardly anything, has trouble carrying things. Can this still be the offset of the shingles or is this something else we should be having checked out?