A few weeks ago my gum had become swollen over my molar on the right. I thought nothing of it and then started to notice what looked to be puss. It finally went down and stopped hurting. Now as of two days ago the same problem started to occur on the left side of my mouth. I have no idea what it is. A friend of the family said it might be my wisdom teeth finally coming in, but he has no time to check it out. Any idea?