Cold Sores vs. Canker Sores — Which Is It?

Canker sores and cold sores sound similar and share a lot of the same feelings when it comes to pain and discomfort, but only one of them is contagious and the other only occurs on the inside of your mouth. Knowing how to tell the difference between these two oral conditions can help reduce the spread of infection and make sure you’re keeping an eye on all the right symptoms.