Bad breath, also known as halitosis, can result from poor dental health habits and can be made worse by the types of foods you eat. The most common cause of halitosis is inadequate dental hygiene. If particles of food are left in the mouth, their breakdown by bacteria produces sulfur compounds. If regular brushing, flossing and hydration doesn’t solve it, the best solution is to see your dentist for a deep cleaning.
The smell of tonsil stones can be quite unpleasant and can lead to bad breath. The odor is caused by the buildup of bacteria, food particles, and other debris that gets trapped in the tonsil crevices. The bacteria break down the particles, releasing a foul smell.

Drinking more water throughout the day helps keep the mouth hydrated and washes away bacteria and food particles. Avoiding foods and drinks that contribute to bad breath, such as garlic and coffee, can also help maintain fresh breath.
Tonsil stones can be uncomfortable and cause bad breath, but they are generally not harmful. Maintaining good oral hygiene can help prevent tonsil stones, and there are several treatment options available if you are experiencing symptoms. If you are unsure whether you have tonsil stones or have any concerns, it's best to consult a doctor.