Introduction : Mouth odor, also known as halitosis, can be an embarrassing issue. Understanding the causes of mouth odor can help you find the best solution to improve your breath. Causes : Poor Oral Hygiene : Plaque and bacteria buildup can cause bad breath. Certain foods : Foods with strong odors, such as garlic and onions, can linger in the mouth and cause bad breath. Dry Mouth : Saliva helps rinse away food particles and bacteria, so a lack of saliva can cause bad breath. Tobacco Use: Smoking or using tobacco products can cause bad breath and stain the teeth. Medical conditions : Certain medical conditions, such as gum disease, sinus infections, and liver or kidney problems, can cause bad breath. Solutions : Good Oral Hygiene : Brushing and flossing regularly, and using a mouthwash, can help remove plaque and bacteria and freshen breath. Hydration : Drinking plenty of water can help keep the mouth hydrated and rinse away food particles and bacteria. Avoid strong-smelling foods : T...