5 doctors weighed in:

How are cold sores different from canker sores?

5 doctors weighed in
Dr. Richard Ruden
Dentistry
1 doctor agrees

In brief: Many differences

Canker sores and cold sores are common disorders of the mouth, irritating millions of americans.
Although many people use the terms canker sore and cold sore synonymously, they are different conditions. Cold sores are caused by the herpes virus and are contagious while canker sores cause is unclear and is not considered contagious.

In brief: Many differences

Canker sores and cold sores are common disorders of the mouth, irritating millions of americans.
Although many people use the terms canker sore and cold sore synonymously, they are different conditions. Cold sores are caused by the herpes virus and are contagious while canker sores cause is unclear and is not considered contagious.
Dr. Richard Ruden
Dr. Richard Ruden
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Dr. Robert Kwok
Pediatrics
1 doctor agrees

In brief: Cold sore is herpes

Cold sores are on the lips or on the face near the lips.
They are caused by recurrences of herpes virus, which lives in the nerves after an initial infection, and then travel down the nerves to cause the cold sores at the skin surface from time to time. Canker sores are inside the mouth, and are not from herpes, but are due to the immune system reacting to something on the inside of the mouth.

In brief: Cold sore is herpes

Cold sores are on the lips or on the face near the lips.
They are caused by recurrences of herpes virus, which lives in the nerves after an initial infection, and then travel down the nerves to cause the cold sores at the skin surface from time to time. Canker sores are inside the mouth, and are not from herpes, but are due to the immune system reacting to something on the inside of the mouth.
Dr. Robert Kwok
Dr. Robert Kwok
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Dr. Alex Shvartsman
Dentistry - Cosmetic

In brief: HERPES!

Great question! cold sores are herpes simplex 1viral infections.
Cancer sores are also probably viral, but no virus has been ever identified. I would avoid oral contact for 2 weeks.

In brief: HERPES!

Great question! cold sores are herpes simplex 1viral infections.
Cancer sores are also probably viral, but no virus has been ever identified. I would avoid oral contact for 2 weeks.
Dr. Alex Shvartsman
Dr. Alex Shvartsman
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