Pimple Turned Into Cold Sore. Pimples form a raised red bump not a blister. I think the wax in the chapstick keeps moisture off the sore area.

Pimples are caused by bacteria while cold sores are caused by herpes viruses. Before the blisters appear you may feel tingling. I think the wax in the chapstick keeps moisture off the sore area.
Cold sores are painful liquid filled blisters that can occur on the lips roof of the mouth or the gums which are caused by the herpes simplex virus hsv-1.
However they have similar symptoms at the initial stage. I think the wax in the chapstick keeps moisture off the sore area. Pimples are formed when the skin pores become clogged with sebum and dead skin cells. Soak a washcloth in warm water and apply it.