This happened to my grandfather years ago and he had issues with it off and on for several years. My grandmother read about a simple way to treat it in "Prevention" magazine. I don't remember all the details but I remember him taking Niacin in increasing small amounts until he felt itchy and hot. Then he took the exact same amount on a daily basis of Niacimide (buffered niacin). He never had a problem with it after that unless he forgot to take his Niacimide for a period of time. He was eventually diagnosed with Ménière's disease.
Back then ('70s) it was unheard of but today many supplements contain niacin in the form of niacimide (B3). This is not a diagnosis but rather a suggestion on where to start your research. Also like stated many time above, go to your doctor.