What Causes Burning Ear Sensations?

Dear Sir Burn Feeling on Ears(Changed to black color) , I had at a time Surbrx-t and Mucaine syrup. after that i had a Dinner. immediately i felt above as said. I was there in Hospital Total night. can you please help me what might be the problem. doctor saying that no problem. what might me the tests required , i want to know the root cause, and impact on me.ThanksGopi . Nallamothu