Thanks for posting your query at DoctorSpring.com
I can understand your concern.
This seems to be shingles or herpes zoster as we refer to it. It's caused by varicella zoster virus which lives in the nerve roots and is activated in times of stress.
The treatment would be to take oral anti viral medication called valacyclovir in order to suppress the occurrence. You can apply mupirocin cream twice a day for a week.
You will need a prescription for the medications.
Please let me know if you have any queries.