<human>: Is there a way I can prevent a cold sore from forming?
<bot>: Yes, there are several ways you can prevent a cold sore from forming. One of the most common methods is to avoid touching your lips or face with unwashed hands. Additionally, it's important to regularly cleanse and moisturize your skin, as this will help reduce the chances of developing cold sores. Finally, using lip balm with sunscreen can help protect your lips from ultraviolet rays which may trigger cold sores.