Bad breath, or halitosis, can be caused by various factors, with the most common reason being microbial deposits on the tongue, especially at the back. Morning breath is common because saliva production slows during sleep, allowing bacteria to grow. Other causes include:

• Certain foods like garlic and onions
• Poor oral hygiene
• Gum disease
• Dental cavities or poorly fitted dental appliances
• Dry mouth (Xerostomia), often due to medications or mouth breathing
• Smoking or tobacco use
• Dehydration, missed meals, or certain diets (such as low-carb)
• Underlying medical conditions like diabetes, liver or kidney issues, and chronic sinus infections

Keeping a record of your diet, medications, and any recent illnesses or surgeries can help your dentist identify the cause of bad breath.