These seem to be an issue for my family. I have one in my mouth right now, and I can't get rid of it. I'll go ahead spare you my usual accompany photo for my post today. :)
Here's the scoop straight from WebMD:
What Causes Canker Sores?
The exact cause of most canker sores is unknown. Stress or tissue injury is thought to be the cause of simple canker sores. Certain foods – including citrus or acidic fruits and vegetables (such as lemons, oranges, pineapples, apples, figs, tomatoes, strawberries) – can trigger a canker sore or make the problem worse. Use of nonsteroidal anti-inflammatory drugs, like Motrin, is another common cause. Sometimes a sharp tooth surface or dental appliance, such as braces or ill-fitting dentures, might also trigger canker sores.
Some cases of complex canker sores are caused by an underlying health condition, such as an impaired immune system; nutritional problems, such as vitamin B-12, zinc, folic acid, or iron deficiency; and gastrointestinal tract disease, such as Celiac disease and Crohn's disease.
A sister in our church says that taking Lysine helps prevent them. My family always used a blue tip match by pressing the unlit tip right on the center of the sore. (You're right. It does hurt. But, the sores sure go away quickly.)
I know there have to be a ton of wives' tales and home remedies out there to get rid of them. I've seem many online today. But, do any of you have a remedy to share? (In the meantime, I'm going on a hunt for matches.)