Whats The Diffence Between A Fogger And A Fumigator Whats The Diffence Between Cold Sores And A Scab?

Whats the diffence between cold sores and a scab? - whats the diffence between a fogger and a fumigator

I took HRT black crust on the upper lip, I think I must bite. My doctor says that your in a cold sore, but wonder whether something is the difference?