Badminton, like tennis, is a racket sport that is played by either two players or two teams of two players each. The object is for you or your team to get to 21 points first. You score a point whenever you successfully serve the shuttlecock and your opposing team commits a fault, which means that the team fails to appropriately return the shuttlecock.
Assuming one cares for their teeth by brushing regularly, saliva may smell bad because there are millions of bacteria present in the mouth. Bad smelling saliva or breath can be indicative of a tooth abscess, or a systemic illness such as diabetes.
Having inadequate saliva can over time cause damage to the teeth. One of the roles of saliva is to protect against cavities. In severe cases, dry mouth can make it difficult to swallow and talk, so it is important to keep the mouth moist. Breathing strictly through the mouth can make the mouth drier, but learning to inhale and exhale through the nose may help, claims the Mayo Clinic.