Here's what research has to say about bad breath and its causes

Bad breath, also known as halitosis, can be caused by a variety of factors. Some of the most common causes include:

• Poor oral hygiene: Bacteria that live in the mouth can produce sulfur compounds that cause bad breath.
• Food: Certain foods, such as garlic and onions, can cause bad breath.
• Dry mouth: Saliva helps to wash away bacteria and food particles, so a dry mouth can lead to bad breath.
• Tobacco use: Smoking or using other tobacco products can cause bad breath.
• Medical conditions: Certain medical conditions, such as sinus infections, bronchitis, and certain types of cancer, can also cause bad breath.

To treat bad breath, it is important to maintain good oral hygiene by brushing and flossing regularly and using an antiseptic mouthwash. It's also important to keep your tongue clean, you can use a tongue scraper. Drinking plenty of water can help to keep your mouth moist and prevent dry mouth. Avoiding tobacco products and certain foods can also help. If your bad breath persists, it is best to consult a dentist or a doctor to rule out any underlying medical conditions.