I've only had one of my wisdom teeth grow out and before it erupted, I had a sore patch on my gum and it was tender to touch but didn't feel any different from any other part of my gum. It felt like an ulcer. I was convinced it was an ulcer so just left it and after a week I still had the pain so had a look in my mouth and saw the tooth starting to emerge through the gum but it was still flat and the point of the tooth hadn't came out yet. Once it started to fully erupt, the pain was more like a toothache than a stingy ulcer like pain and I got bad jaw pain as well.