Cold sores are common, and they can sometimes appear under the nose. Learn about the symptoms, causes, treatment, and prevention of cold sores under the nose.

Stress is a well-known trigger for cold sores. Other triggers include fatigue, sun exposure, food sensitivities and allergies, medication interactions, and menstruation or hormonal changes. I get ...

Cold sores are small blisters that usually appear around the mouth. Find out how long they last, the stages of healing, and treatments that may help.