Hi I am a 18 year old women, I woke up this morning and felt something in my mouth, when I went and had a look in the mirror I had found a white and black bubble looking lump on the left side of my mouth and to wards the back (around my second molar), over the night of it growing, it has rubbed against my cheak and now that has a white pach on it to. It does have some sensation to it but I would say that it hurt, it could just be an ulsa but I have never had one this big. Just wanting to know what it could be getting a bit worried thanks