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Many folks eat high lysine foods prior to or during a cold sore event, and avoid high arginine foods. For many folks, healing cold sores fast has been as simple as taking 1,000 milligrams to 3,000 milligrams of lysine in capsule supplements during an outbreak. High lysine foods to eat are most meats and dairy products.
A Sharecare Ad Target User , Administration, answered. Oral herpes, or cold sores, goes away on its own in about one to two weeks. Taken early, antiviral medications can help cold sores heal in a shorter amount of time. If your cold sore lasts more than two weeks, speak to your doctor.