Burning ears can be a sign of food allergy or intolerance.
It often shows up in children this way.

I'd investigate gluten as a culprit first. But other foods may cause burning too. I get burning feet from potatoes, of all things. (potatoes are nightshade veggies, including tomatoes, peppers, eggplant).

We have a gluten forum here:
http://neurotalk.psychcentral.com/fo...aysprune=&f=13
The Gluten file is linked in the sticky threads there. In it are papers showing the connection to neuropathy.
http://neurotalk.psychcentral.com/thread1872.html

Cortisol levels fluctuate in a 24 hr pattern. They go up after you eat in the morning, to the highest level of the day. There is a dip around 4pm (teatime), and a smaller peak after supper. The absolute lowest is around 3-4 am.(this is the time where many hospitalized patients die BTW).

I'd also switch to baby shampoo for a while, in case there is something in your shampoo that is bothering you.
Have you tried antihistamines at night like Benadryl? Benadryl is the strongest one for skin reactions. (Claritin is mostly useless)