Dental visit ( cleaning n dental check up) bcoz if a lil food collect b/w ur tooth it will decay n cause smell r any decayed tooth also cause smell, u can follow these Eat foods rich in fiber, Drink green and black teas, Avoid drying medication: Try not to take antidepressants, diuretics, pain relievers, and antihistamines unless it is absolutely medically necessary. These drugs inhibit saliva flow and can cause chronic dry mouth. Avoid products with sodium lauryl sulfate or alcohol,stop smoking, Use an oral probiotic like S. salivarius K12 and M18: Use probiotics to balance the oral cavity and prevent an overgrowth of the odor-causing bacteria involved in halitosis.few people have bad breath using diary product. Check once leaving a day without diary product,u can use thera breath a mouth wash .. which will reduce bad breath

Hai....other than checking toothpaste brands you do twice brushing daily and maintain oral hygiene well...for bad breath may be due to deposits on tooth which can be removed by scaling procedure though many other reasons there for bad breath...

Any toothpaste is good provided you brush your teeth after each meal,especially after the last meal at night,so start brushing after each meal,get a scaling done from dentist to get rid of the bad smell from mouth.