The most common cause of bleeding from the mouth of the injury (an injury to the language and the inner surface of the lips), or engraved with one or more teeth.

The first aid print bleeding area with sterile mulovým square, or at least a clean handkerchief (never use cotton wool). From the outside of the face or lip enclose icepack. When bleeding can help weaker rinsing your mouth with ice water.

If it was stamped with a tooth, put in the gap caused by bleeding tampon twice higher than the surrounding teeth and let it bite victim. Knocked out tooth-rinse, gently insert into possible sterile gauze or a clean handkerchief or into a cup of milk and the victim promptly deliver to the dentist to try to replanting the tooth. The chances of successful implementation falls to zero in about two hours.

Minor spontaneous bleeding during the day, dominated after brushing your teeth can be a sign of gingivitis or periodontitis. We consult with the dentist.

Rarely, bleeding from the mouth occurs when blood clotting disorders (hemophilia or lack of platelets).