Elderly people bleeding teeth may be caused by pulpitis, periodontal disease or blood system diseases, specific need to go to the hospital to check the oral cavity. 1. Pulpitis: bleeding teeth in the elderly may be tooth decay appeared pulpitis, pulp cavity exposed pulp tissue exposed, spontaneous pain and hot and cold stimulation severe pain, in the inflammation of the stimulation will appear pain bleeding symptoms. 2. Periodontitis: poor oral hygiene, tartar attached to the neck of the teeth can lead to periodontitis, causing bleeding, redness, swelling and pain at the gum margin. 3. Blood system diseases: Suffering from blood system diseases such as leukemia, hemophilia can cause coagulation dysfunction, the gums are easy to bleed mistaken for dental bleeding. The specific causes of dental bleeding in the elderly, need to go to the hospital to do oral and systemic examination to be clear, need to follow the doctor’s advice and reasonable diagnosis and treatment.