6 doctors weighed in:
Is there a difference between a blister/cold sore and a canker sore?
6 doctors weighed in

Dr. Anifat Balogun
ENT - Head & Neck Surgery
3 doctors agree
In brief: Cold vs Canker sore
A cold sore or fever blister typically occurs outside the mouth; around the lips, chin and just under the nose, and are caused by herpes simplex virus type 1.
In the event that a cold sore occurs in the mouth, you'll see it on the gum or soft palate. Canker sores typically erupt inside the mouth; on the tongue, inner lip and lining of cheeks. Exact cause is unknown.

In brief: Cold vs Canker sore
A cold sore or fever blister typically occurs outside the mouth; around the lips, chin and just under the nose, and are caused by herpes simplex virus type 1.
In the event that a cold sore occurs in the mouth, you'll see it on the gum or soft palate. Canker sores typically erupt inside the mouth; on the tongue, inner lip and lining of cheeks. Exact cause is unknown.
Dr. Anifat Balogun
Dr. Anifat Balogun
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Dr. Steven Machtinger
Internal Medicine - Allergy & Immunology
3 doctors agree
In brief: Cold sore is herpes
Cold sores or fever blisters are caused by herpes simplex type i (hsv 1).

In brief: Cold sore is herpes
Cold sores or fever blisters are caused by herpes simplex type i (hsv 1).
Dr. Steven Machtinger
Dr. Steven Machtinger
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