Canker sores often seem to pop up out of nowhere and, once you have them, they’re often painfully hard to ignore — especially when you try to eat or even talk. So what, exactly, are canker sores? They ...

Canker sores are small, painful reddish lesions in the mouth that have a white or yellow center. Some causes of canker sores are spicy/acidic foods, vitamin deficiencies, braces, and stress. Most ...

A young nurse and mother initially thought the red spot on her tongue was the physical toll of a bad breakup, but the reality ...

In 2025, Rachel Passarella, a 42-year-old nurse based in Sarasota, Florida, was misdiagnosed multiple times before a swollen ...

Canker sores are bacterial, non-contagious infections that occur on the gums, inner lips, inside the cheeks and sometimes on the tongue. They are usually red and round with a white center. Most canker ...

Canker sores (sometimes referred to as mouth ulcers or “aphthous ulcers”), can be intensely painful. The Mayo Clinic defines canker sores as “small, shallow lesions that develop on the soft tissues in ...

Rachel Passarella says doctors dismissed her tongue cancer symptoms for months before she was diagnosed with Stage 2 disease.

Cold sores occur on the outside of the mouth and are caused by the herpes simplex virus. Canker sores are blisters inside the mouth that can occur due to injury, nutritional deficiencies, and ...

Canker sores, though often overlooked, are a common oral health issue that can cause considerable discomfort. These small, painful ulcers typically form inside the mouth and can interfere with daily ...

Rachel Passarella recalls for PEOPLE how an "abnormal" red spot on her tongue was dismissed multiple times before she was ...

Add Yahoo as a preferred source to see more of our stories on Google. Canker sores can be caused by acidic or spicy food, braces, or vitamin deficiencies. Alona Siniehina/Getty Images Canker sores are ...