Halitosis, commonly known as bad breath, is a condition characterized by an unpleasant odor emanating from the mouth. It can result from various factors, including poor oral hygiene, certain foods, and medical conditions. Bacteria in the mouth break down food particles, producing sulfur compounds that contribute to the foul smell. Maintaining good oral hygiene, such as regular brushing and flossing, can help prevent halitosis. Additionally, staying hydrated and avoiding foods like garlic and onions may reduce the occurrence of bad breath. If halitosis persists, it may be advisable to consult a dentist or healthcare professional for further evaluation.