Question:
What is the cause of/a home remedy for canker sores?

Yesterday or so one of these canker sores popped up on my upper lip inside my mouth, and it got worse quickly. It hurts like heck and I'm looking for a fast remedy that might speed the healing, that can be made at home. I tried rinsing my mouth with saltwater, but because the sore is on my lip I don't think that the saltwater even touched it. I'd also like to know what could've caused the canker sore.

Answer: I don't know any home remedies, except abreva from the store. But as for what causes them, I've noticed that I tend to get canker sores when I haven't been getting enough sleep for a few nights in a row, and eating sugary foods tends to make them stick around longer before they heal.