Yesterday, I when I woke up I felt like someone had punched me on the lip. It was swollen. When I went to look at it, I had a small whitehead on my lip line. It doesn’t itch or burn. I popped it last night but it was very hard to pop and it hurt. This morning I popped it again, it is not as swollen but it is red and barely a scab there. It still hurts a bit. My dad said it is a cold sore, but I think it is pimple… can anyone tell me what it is cold sore or pimple?