brushing too hard when brushing your teeth can cause your gums to bleed either from trauma or from the bristles cutting the gum. that can cause ulsers.

ulsers can bleed, the surface is thin and tender, doesnt take much to cause bleeding.

if its an ulcer, gargle with an antibacterial anti septic gargle like difflam-C, it will help with pain and aid in recovery, vitamin B complex will also help with recovery. make sure to drink enough water.

someone translate what nanah is in english.