Cold Sores vs Canker Sores: What's the difference

Cold sores and canker sores are common mouth conditions that can cause discomfort but are often confused due to their similar symptoms. While both can lead to irritation, they are distinct in their causes, appearance, and treatment. Understanding these differences can help you manage these conditions more effectively.

Cold sores, also known as fever blisters, are caused by the Herpes Simplex Virus (HSV-1). This viral infection is contagious and can be triggered by stress, sunlight, or a weakened immune system.

  Herpes Simplex Virus (HSV-1)

  - Fluid-filled blisters on or around the lips.

  - Blisters eventually burst and crust over.

  - Can cause significant pain, especially in the early stages.

  - Often preceded by a tingling or burning sensation.

  - Over-the-counter antiviral creams like acyclovir.

  - Prescription antiviral medications for severe cases.

  - Managing triggers, such as stress and sun exposure.

Canker sores, unlike cold sores, are non-contagious ulcers that form inside the mouth, often on the inner cheeks, gums, or tongue.

  - The exact cause is unknown.

  - Potential triggers include stress, mouth injuries, or acidic foods.

  - Small, round ulcers with a white or yellow center and a red border.

  - Always appear inside the mouth.

  - Mild to moderate discomfort, particularly when eating or speaking.

  - Less painful than cold sores.

  - Generally heal on their own within 1-2 weeks.

  - Over-the-counter topical treatments and mouth rinses to soothe pain.

Though cold sores and canker sores may seem similar, they differ in significant ways. Cold sores are viral, contagious, and appear outside the mouth, while canker sores are non-contagious and occur inside the mouth. Proper identification and treatment can reduce discomfort and manage symptoms effectively.