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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.
There are some effective cold sore remedies, and no prescription is needed from a doctor. The best over-the-counter medicine will not only reduce the burning pain, but help the sore and scab to go away in just 2 to 4 days. Cold sores cause pain, irritation, and look nasty.