Gums broke a mouth, if the trauma, generally pay attention to oral hygiene, prevent infection can be; if the apical periodontitis, need to take root canal treatment. 1. Trauma: If there is trauma, resulting in gum wounds caused by the gums broke a mouth, with iodine routine disinfection, pay attention to oral hygiene, if it does not cause persistent bleeding, severe pain, generally do not need special treatment, the saliva inside the mouth has a bactericidal effect, the majority of the recovery will be on their own. 2.apical periodontitis: will cause the root area of the tooth suppurative infection, may cause abscess on the gums, resulting in gums broke a mouth, most of them will also be accompanied by pus overflow, should go to the regular hospital in a timely manner to take the root canal treatment, discharge pus, and change the medication on time, root canal treatment. Gums broke a mouth, there may be other reasons, you need to go to the hospital for examination, clear cause of the treatment as prescribed by the doctor.