A member asked:

Can you put hydrogen peroxide on lip blister or cold sore?

9 doctors weighed in across 3 answers
Dr. Marius Frasie answered

Specializes in Internal Medicine

IT: Will really not help at all. Try abreeva.

Answered 11/25/2018

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Yes: It may burn and will not cure the lesion. Cold sores are viruses and acyclovir may be needed.

Answered 11/25/2018

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Dr. Paul Grin answered

Specializes in Pain Management

Definitely, yes: The mouth contains many bacteria. For this reason, a hydrogen peroxide often is used for a lip blister. Cold sores generally clear up without treatment within 10-14 days.

Answered 11/25/2018

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