hi there, acid reflux
techincally means that the gastric juices which are very rich in acids get thrown back up your food pipe and into your oral cavity and it can reach to any place in your mouth. As the opening of the eustachian tube is inthe lateral wall of the oral cavity it can reach the ears tho' uncommonly. The burning pain is a result of that. You need to take medication prescribed by your doctor for the same. Also a small change in lifestyle may help. You should try taking small meals preferablely low in fat and spices and eat early supper, a small stroll post diner and atleast a gap of 1 hr before bedtime will help. Try to be in uprighy position and not recumbant immediatedly after meals. Hope these small measures help. take care.