I used to get canker sores a lot. Swishing or gargling with salt water can help.
Then I used Kanka. It used to be called Kankaid. it is a liquid that covers the sore so it can heal. It helped a lot.

I get them some times I was told that stress can cause them there is a medicine that you can get over the counter for them. I can't think of the name right now, but I will get it for you. I have one right now and it started from be biting my lip in my sleep the other night. I will be praying they get better cause they really can hurt, God Bless...🙏🤗🙂

Lysine helps. Take it daily.

We have an aloe plant that we cut into and my daughter, 21, rubbed it on her canker, it didn’t get rid of it but relieved some pain!!

I used to get them in High school, a couple times in college but I think it’s do to stress. I can’t recall any other time but once in my 20’s. I am now 54 & being DIAGNOSED when I was 27, I haven’t had one since, thank God. They are 😖 painful!😔