Cold sores spread easily through physical touching and sharing objects with individuals carrying the infection. Some of the best ways to prevent spread during a flare-up is to maintain a regular handwashing routine and avoiding kissing, cuddling, and other physical contact as soon as the first symptoms are felt. For those who have not had cold sores, UV rays and cracked lips may activate HSV, so doctors recommend minimizing prolonged sun exposure and protecting lips from the sun, wind, and cold.

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