I have a canker sore that leaves blood on my lips when I wake up, how can I stop this?

Try taking an alka seltzer tablet and putting a tiny pit of water on it Like a few drops, then take a cotton swab and dip it into the moist part of the alka seltzer and then take the cotton swab covered in alka seltzer goo and place it on the canker sore for a few minutes. It will help heal it up. You can do this a few times a day