They commonly pop up on the inside of the lip or cheeks. Canker sores have a litany of causes including trauma, hormonal changes, stress, and food allergies, explains Hannah Kopelman, D.O., a ...

Wondering how to get rid of cold sores? You're not the only one. Both cold sores and HSV-1 (herpes simplex virus type 1), the virus that typically causes them, are incredibly common. As of April 2023, ...