A low platelet count, mouth sores and gum disease can all cause mouth bleeding, explains the American Cancer Society. A vitamin deficiency, pregnancy, hemophilia and cancer can also result in mouth bleeding, especially bleeding gums, notes Healthline.
Hemophilia and a low platelet count both interfere with the blood's ability to clot, which not only increases chances of mouth bleeding but also prolongs it, states Hemophilia of Georgia. Chronic mouth bleeding, especially from the tongue and cheeks, can impede breathing. However, there is a factor concentrate and a medication, Amicar, available to help increase blood clotting in the mouth. Hemophiliacs can prevent mouth sores by practicing good oral hygiene, avoiding gum and eating slowly.
An individual with mouth bleeding due to gingivitis needs to practice good oral hygiene by brushing and flossing daily to prevent the onset of periodontitis, according to Healthline. Periodontitis occurs when gingivitis advances beyond the gums to bone and other tissue. This causes not only mouth bleeding but also loose teeth. Gums can bleed because of deficiencies of vitamins C and K, which can be treated with a healthy diet. An individual without enough vitamin C and K in his diet needs to eat strawberries, tomatoes, citrus fruit, spinach and other leafy greens.