What could cause a red, blotchy tongue?

Reflux: One cause could be reflux with stomach acid reaching the mouth at night while lying down. This can result in a sore tongue , damage to the teeth, and possible damage to the larynx.A definitive diagnosis ma require a test with a GI doctor.

Many possibilities: Your tongue can be irritated or change color for many reasons. Ingredients from mouthwashes and toothpastes can cause problems, as can certain foods. Infections and diseases may cause changes in the appearance of the tongue also. If the coloration lasts for more than a few days, go see your dentist or health care provider.

Geographic tongue: It can be from chronic inflammation or genetic in origin. See an ENT doctor if symptomatic.

VisualDX: Hi, it’s hard to say without a picture but there is a great app that may be able to help you get a diagnosis without being seen in person by a dermatologist. The app is called VisualDX and is one of the best, if not the best out there. Many clinicians, including myself, use it. Just snap a photo and it gives you a list of possible diagnoses. Good luck!