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A Sharecare Ad Target User , Administration, answered. An outbreak of oral herpes, or cold sores, should go away on its own in about one or two weeks. Antiviral medications can help them heal faster if taken early. Talk to your doctor if your cold sores do not go away after two weeks. Helpful? 1 person found this helpful.
Cold sores will usually heal within two weeks without treatment. However, there are established cold sore treatments available to help decrease healing time, reduce pain, and in specific cases, suppress the recurrence of the virus.