Bad breath serious want to solve need to go to the hospital to find out the cause of bad breath, can be due to cleaning is not in place or inflammation caused by the need to clean the oral cavity or the cause of the disease treatment. 1. Clean the oral cavity. Bad breath may be caused by poor oral hygiene, tartar and tartar buildup in the mouth, and bacteria fermentation in the mouth causing bad breath, which requires dental scaling to remove tartar, effective brushing on a daily basis, and flossing to clean the neighboring surfaces of the teeth. 2. Treatment of diseases. Bad breath can be caused by inflammation in the mouth, periodontitis needs periodontal treatment to eliminate inflammation of the gums, pulpitis, apical periodontitis needs root canal treatment, oral candidiasis caused by the need to use sodium bicarbonate solution gargle treatment. Severe halitosis may also be caused by digestive or respiratory diseases, which should be treated with omeprazole or bromhexine and other medications, and surgical treatment if necessary. It is recommended to go to the hospital in time to check the cause of bad breath and deal with it in time. Use medication under the guidance of a physician.