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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.
1 Vitamin E, and echinacea are said to help treat cold sores. 2  Don't squeeze or touch the sore, it will probably just get more infected. 3  Aftershave will dry up the cold sore and speed up the healing. 4  When eating, try to take smaller bites to limit the stretching action of the lips during healing.