could very likely be xerosis my wife has it in her ears and uses medicated creams
try those and google more your regular doc can refer you to dermatologist
a dermatologist will diagnose and treat better that regular docs
good luck (ps this is migraine forum skin and other forums are in the list but its ok lets just get you help)
Try Tea Tree Oil available at most pharmacies or health food stores.
Do you have TMJ on that side?
Mine itches too and I know it's becauSe of my TMJ. The ENT also suggested dry skin but it's on my painful/bad side of my jaw and the nerves go into the ear area.