why does my tongue burn
Burning mouth syndrome. Overview. Burning mouth syndrome is the medical term for ongoing (chronic) or recurrent burning in the mouth without an obvious cause. This discomfort may affect the tongue, gums, lips, inside of your cheeks, roof of your mouth or widespread areas of your whole mouth. The burning sensation can be severe, as if you scalded your mouth. Burning mouth syndrome can appear suddenly or develop gradually over time.
Pineappleitis: Pineapple commonly causes minor skin irritation because it's highly acidic. It's common for your tongue to feel gritty, itchy and mildly painful after eating pineapple. If you develop severe pain, itching, burning or swelling in your tongue from eating pineapple, you should talk with your doctor.