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A 18-year-old member asked:

How do cold sores accur?

2 doctor answers4 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
Herpes virus returns: Cold sores on the lips or near the lips, are usually caused by recurrent oral herpes virus. They start as a slightly raised reddish area, then form a cluster of tiny blisters, which break open soon, leaving a sore (ulcer) to heal up over a week. Sores appear more often when one is under stress or is ill from another illness. Younger babies with herpes should see a doctor when a sore appears.
Dr. John Thaler
Prosthodontics 41 years experience
Virus: Two kinds of these are common, and both caused by virus. Least worrisome, is the aphthous ulcer. Occurs on the soft tissues of the mouth -- inside lips, cheeks, under tongue. The worse one is herpes.The first time you get it, it can be anywhere in the mouth and outside the mouth. After that , in the mouth, it will only be on tight tissues -- roof of mouth, and right along gum line around teeth.

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A 21-year-old member asked:

What are cold sores?

3 doctor answers11 doctors weighed in
Dr. Ankush Bansal
Internal Medicine 17 years experience
Herpes: Cold sores around the mouth are usually herpes simplex type 1. They can also occasionally be type 2. The sores or ulcers are reactions to the virus replicating in a nerve cell and manifesting on the skin. The fluid inside the sore is full of new virus. See your doctor so you can be prescribed a medication to control the virus.

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Last updated Mar 21, 2018

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