The causes of toothache bleeding include a large number of stones attached to the cervical and root surfaces, incomplete eruption of wisdom teeth, caries cavities in the crown of the tooth and the pulp cavity penetration, as well as other factors, etc. The details are as follows: 1, the cervical and root surfaces attached to a large number of stones: the cervical and root surfaces attached to a large number of stones, it will lead to a large number of gingival capillaries proliferation, as well as the brittleness increase. 2, incomplete eruption of wisdom teeth: wisdom teeth are covered by the gums in the distal jaw, resulting in swelling and pain in soft tissues. When brushing and eating, the soft tissues continue to ooze blood, accompanied by swelling and pain.2. Incomplete eruption of wisdom teeth: when wisdom teeth are incompletely erupted, the distal middle of the maxillofacial surface is covered by the gums, which produces a gingival flap, and the embedded food residues and soft tartar can cause gingival swelling and pain, and the gingival flap will ooze blood when it is bitten.3. Carious cavities of the crowns of the teeth are penetrated into the pulpal cavity: when the carious cavities in the crowns of the teeth are penetrated into the pulpal cavity, pulpal tissues will be formed by the chronic bacterial stimulation, which will fill with pulpal polyps, which will be filled with caries. Pulp polyps that fill the cavity. Embedded food debris can trigger pain, accompanied by a lot of bleeding.4, other factors: poor adjacency between two teeth, often retained food fiber, the gingival papillae are obviously red and swollen, and constantly oozing blood.