I have had an extremely lg canker sore for over a yr. Aphthasol helped with pain but I still have the canker sore.
I went to the dentist after 4 months of this growing. I used aphthasol for 2 months and it helped with pain & reduced the size slightly, but it did not heal. I began getting canker sores all of the time for a little over a year now and previously never had them. My inner cheeks and tongue swell frequently.The large sore is on my lower gums. Also, I have removed anything acidic from my diet when this started. What could be causing this and why won't the big sore heal? What should I do now?
It sounds like it may be something more serious if you are having them that frequently and swelling. Also, since you have had the large one for so long I am not sure if this will work for you or not but it is worth a shot.
Every time I have gotten a canker sore I put a good amount of baking soda on it and it goes away almost instantly. Usually I would wet my finger, put it in the baking soda, and then put as much between my lip/cheek and my gum and let it sit on it as long as possible.
I would still seek treatment with your doctor but hopefully this will help you in the meantime.
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