I was sitting on the couch about 10 minutes ago and I felt my top gum where it meets with the tooth with my tonge and I tasted blood. I went and spit in the sink no doubt it was blood. It started bleeding out of no where. What could have caused my gum to just start bleeding?
Also it could be a sign of cavities.
The reason I say cavities is because when you eat too many sweets or sugary products your teeth began to bleed a little or alot because when you brush your teeth you didn't make sure all of the sweets where out of your teeth.
Best thing I can tell you is to go visit your dentist and get a root canal and teeth cleaning check up, just to be safe.