Gargle with an antiseptic mouthwash. Your saliva is important in the fight against bad breath as it suppresses bacteria that cause it. Anything that reduces the saliva output, such as alcohol, antianxiety drugs, smoking, stress, and medications such as decongestants and diuretics, allows the microorganisms to proliferate. The types of food you eat may be one of the reasons for your bad breath. Acidic foods, for instance, create an environment for bacterial growth.
Some people have a hard time metabolizing meat and dairy products, with the result being bad breath.
As these foods are digested certain compounds are transmitted from the blood through the lungs and exhaled for up to 24 hours. Cheeses, such as blue, Camembert and Roquefort, fish, especially canned tuna and anchovies, and spicy deli meats are often the culprits. Beverages such as coffee and tea are other possible sources of bad breath. They are both very acidic. Cut back on these and see what happens.