The main cause of dry mouth and bad breath has a lot to do with the growth of oral bacteria. Oral bacteria directly caused by oral odor, oral bacteria caused by periodontitis, gum bleeding, oral mucosa damage. Causes the mouth to have bad odor dry mouth bad breath. Treatment of oral bacteria caused by dry mouth and bad breath. First of all, clean the oral odor every morning after waking up in the morning, in the middle of the day, after dinner in time to brush your teeth. If the oral bacteria caused by inflammation and bleeding gums, periodontitis and other problems will aggravate the generation of bad breath, to solve the root cause of bad breath, you must thoroughly remove the bacteria in the mouth, while establishing a good environment in the mouth that is stable and unsuitable for the generation of bacteria. Commonly used methods to get rid of bad breath include improving oral circulation, repairing damage to the mouth, and eliminating the bacteria that cause oral problems. Dry mouth, bad breath, can also be caused by fire. The use of a lot of stimulating food (such as onions, ginger, garlic, leeks, etc., spicy food). It may also be caused by gastrointestinal disorders. These diseases should be treated from the root cause. In short, you must pay attention to: your oral hygiene in your life and develop a good habit of brushing your teeth morning, noon and night.