Which test would you order for these painful vesicles?
![Ramsay hunt syndrome](https://www.ausdoc.com.au/wp-content/uploads/2022/08/quiz-ramsay-hunt-syndrome_dedeemurrell-2.jpg)
A 43-year-old man presents with a two-day history of painful vesicles over the left side of the chin, cheek, ear and scalp, which subsequently became yellow-coloured and crusted.
In addition, he reports shooting pain affecting the left side of the face and tongue.