Since bacteria thrive on foods or beverages that are rich in carbohydrates, one must cut down on intake of foods that are sugary, starchy or acidic. Smoking or chewing tobacco can also irritate the gums, and may lead to serious diseases, so, it would be in your best interest not to smoke or chew tobacco. If your gums bleed very often, the wise thing to do would be to consult a dentist for the treatment of irritated gums. An early diagnosis can prevent gingivitis from turning into periodontal disease.