Case 1
My dx is herpes zoster oticus.

(May be Ramsay hunt syndrome-old age seems pointing towards that but history is too short to be sure about that- no h/o facial weakness and not past h/o chickenpox infec)

Basis:-H/o of pain, fever and typical feature of vesicles on aud cnal and ext aud meatus.

DDX:- Acute otitis media , otitis externa, myringitis bullosa. Ramsay hunt syndrome.

Work up:- Usually History, auditory function tests and otoscopic examination suffice.
However sometimes typanometry, vesical fluid examination or diagnostic imaging to rule out complications may be required.

Treatment:- Analgesics and Antivirals.