![]() Cold sores are tiny, fluid-filled blisters that ooze and then crust over the surface of the mouth.Canker sores appear as small, oval-shaped, gray or white area that is surrounded by a red halo.
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![]() Cold sores are tiny, fluid-filled blisters that ooze and then crust over the surface of the mouth.Canker sores appear as small, oval-shaped, gray or white area that is surrounded by a red halo.
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