I currently have a cold (runny nose, post-nasal drip, cough) and yesterday I noticed a pain in my mouth. On the left side of my mouth, on my gum, about half way down, between two teeth. It's slightly swollen, and there is a white dot- that almost looks like a hole. I have swished with salt water and it didn't hurt. However it does whenever I put pressure on it. My teeth don't hurt, and they aren't loose at all. It just started bleeding. And so I was wondering what to do about it.