Jan 5, 2024 · Cold sores usually heal in 2 to 3 weeks without leaving a scar. Cold sores spread from person to person by close contact, such as kissing. They're usually caused by herpes …

Some people have triggers that cause outbreaks of cold sore. A serious sunburn triggered this teen’s cold sores. What causes cold sores? A virus causes cold sores. Most cold sores are …

A cold sore[a] is a type of herpes infection caused by the herpes simplex virus that affects primarily the lip. [1] Symptoms typically include a burning pain followed by small blisters or …

Aug 11, 2025 · Cold sores are painful blisters caused by an infection with the herpes simplex virus (HSV). Learn more about the causes, risk factors, symptoms, treatment, complications, and …

Nov 20, 2025 · Cold sore triggers vary, but they always involve your immune system being weakened in some way. Common causes include illness, sleep deprivation and stress.

Jul 20, 2025 · Cold sores and canker sores both cause pain and discomfort, but that’s where their similarities end. Canker sores are ulcers that form on the inside of the mouth, tongue, throat, …

May 29, 2025 · Type 1 usually causes oral herpes, or cold sores. Type 1 herpes virus infects more than half of the U.S. population by the time they reach their 20s. Type 2 usually affects …

Dec 18, 2025 · Cold sores are caused by the herpes simplex virus (HSV). HSV is spread through contact with infected saliva or skin. After the initial infection, HSV tends to stay inside your …

Jul 29, 2025 · Cold sores are small, painful blisters that typically appear on or around the lips and mouth. These lesions result from the herpes simplex virus (HSV), a highly contagious …

Oct 2, 2025 · Cold sores—also called fever blisters—are painful, fluid-filled sores that most commonly appear on the cheeks, lips, and tongue. An infection of the herpes simplex virus …