Bleeding Canker Sore

This is the fourth day of the sore and when I brush my teeth he started to bleed ... Is this good or bad? What should I do?

Use Biotene toothpaste, sold almost everywhere

It will heal on its own initiative. If you switch to a toothpaste without SLS (sodium lauryl sulfate), you'll have far fewer ulcers. The easiest way is to find the money "extra" Sensodyne toothpaste. Rembrandt makes one, but it is expensive.

http://en.wikipedia.org/wiki/Canker_sore ...