The first sign of gum disease (gingivitis) is red, bleeding gums. It is not normal to spit blood after brushing or flossing.
recently extracted tooth. Air is exposed directly to the bone and is very
painful. Bleeding within the socket needs to be stimulated to create a new
blood clot to form to allow the site to heal quicker. Your dentist should
have some medicated paste to help with some of the pain until it heals.