Halitosis is an embarrassing problem. If you notice that your friends and family is avoiding staying in front of you while you are talking, it really makes an uneasy condition to stay over there. Halitosis Causes an embarrassing and uncomfortable situation. Usually the odor produces inside the mouth. If you eat anything and forget to wash your mouth or brush your teeth, the small particles of the food remain in your mouth. The bacteria are there to make odorous compounds with the small particles. Foods like meat, fish, cheese etc. are the reason for bad breath. Always wash your mouth properly after eating something.