Drinking more water is useful for bad breath, but it is not the fundamental solution to bad breath, most of the bad breath is still a problem of oral origin, you should check the oral cavity. The oral cavity, whether gingivitis, periodontal pockets, tonsillitis, etc. are able to cause bad breath, it is necessary to solve these sources of disease. If you usually do not pay attention to oral hygiene, tartar is not cleaned in time, the accumulation of calcification, the formation of calculus, calculus itself will be very smelly, will cause gingivitis, aggravate bad breath. In this case, you should go to a professional organization to do dental cleaning, it is best to adhere to regular dental cleaning, daily life should not only drink more water, but also drink some green tea, not only anti-inflammatory and antiseptic, but also can clean the mouth, fresh breath.