Waking up with bad breath is recommended to go to the hospital to do a comprehensive oral examination, if there is tooth decay, you need to fill the cavity in time to repair. The decayed teeth around the cavity will be removed, and then filled with specialized materials to avoid the cavity filled with food fermentation and produce bad smell. If there is calculus, ultrasonic cleaning is required. This will remove all the calculus and plaque attached to the surface of the teeth. If there is also calculus below the gums, a subgingival scraping is also required. Without the stimulation of the external factors of dental calculus, the symptoms of bad breath will improve significantly. In addition, it is important to brush your teeth carefully and for no less than 3 minutes at a time. It is also best to floss after brushing and clean the crevices of your teeth. Don’t eat again after brushing at night, and if you have the conditions, it is recommended that you go to the hospital regularly to have your teeth cleaned, and have your teeth cleaned every six months or once a year, depending on the actual situation.