I have one problem, I underwent orthodontics 2 months ago, in the mouth left side down I have a pimple or ulcer, I complex tablets for 10 days, I used ulcer ointment also, but problem is, in the down, my bracket having sharp pain, it touching to ulcer place always whenever my lip talks, that's the reason, it unable to cure, I used to put coconut in that place but still same problem. Pls giv idea?