text: Wear chapstick with an SPF to prevent them because the sun can make them pop up. Also if you feel one coming, take an L-Lysine pill (often, as much as the bottle says to take) this also can be taken to prevent them. and try using a product called "abreva" its kind of expensive ($17) but works great. The trick is to use it asap because it speeds up the healing process. If they become a big problem try seeing a doctor, my sister used to get them all the time, since she saw a doctor, she prescribed her a strong medication and now she never gets them.