After you pulled the tick off was it complete? Did you see the head? It is possible it is still in there? Did you save the tick to show to the vet?

What kind of tick was it? Was it decent size or very small? Not to alarm you but if it was very small it could of been a deer tick. This is the kind that carries Lyme disease. Sometimes they are so small you need to use a microscope to see if you got it all. Bigger ticks are usually less dangerous but still can make the spot pretty irratated. I always use alcohol immediately after removing the tick and keep and eye on it for days. It is normal to have some irratation afterward but not pain.

Since there is pain I would take the pup to the vet since the head is probably still in there.