Burning mouth syndrome is an ongoing (chronic) or recurrent burning in the mouth without any known reason. You will feel uncomfortable and it can affect your tongue gums lips inside of your cheeks and the roof of your mouth. It can be severe and you will find it difficult to eat/ drink/ swallow. You may suffer from it suddenly and it will tend to develop gradually. You may exhibit symptoms like loss of taste Taste changes such as a bitter or metallic taste and a bumpy appearance with redness on the tongue. So just consult your doctor and seek a