Cold sores, caused by the herpes simplex virus, can vary in size. Typically, they start as small blisters but can grow larger if multiple blisters merge. Here are some details: 1. Individual Co...

Cold sores, also known as oral herpes or fever blisters, typically start small and can grow up to about 3-5 millimeters in size. They usually begin with a tingling sensation before forming into fluid-filled blisters that eventually crust over. The actual size of the cold sore may vary depending on the individual and how severe the outbreak is. It's essential to avoid touching or picking at cold sores to prevent further irritation and potential spread of infection. If you're experiencing frequent outbreaks, it might be helpful to speak with a healthcare provider for management strategies specific to your situation.