A mouth ulcer is a painful and typically small lesion that develops in the mouth. Discover causes, how it compares to a cold sore, prevention tips, and more.

A bitter and bloody war in Ukraine has devastated the country, further isolated Russia from the West and fueled economic insecurity around the world.

Research shows that the effect of stress on the body — chiefly the way it triggers inflammation — contributes to the development and worsening of many chronic conditions.