your first and most important step is to see your dentist so you can have your teeth and gingivae (gums) properly examined. teeth do not bleed of course but the gums are very vascular. there can be numerous reasons but it would not be prudent to blindly guess over the internet. your dentist will most definitely help you.
when i blow my nose or brush my teeth my front teeth bleed! what can cause this and what can i do to stop it?