Bad breath is a common problem that can affect anyone at any age. It affects most people at some point, and it's estimated about 1 in 4 people has bad breath on a regular basis.
The medical name for bad breath is halitosis.
Bad breath can have a number of possible causes, but it's usually the result of poor oral hygiene. If bacteria build up in a person's mouth, it can cause their breath to smell.
Bacteria break down pieces of food in the mouth, releasing unpleasant smelling gas. Any food trapped in your teeth will be broken down by bacteria, causing bad breath.
Persistent bad breath can sometimes be a sign of gum disease.
Eating strongly flavoured foods, such as onions and garlic, can often cause your breath to smell, as well as smoking and drinking a lot of alcohol.
Bad breath can occasionally occur following an infection or illness, or as a result of taking certain types of medication.
Read more about the causes of bad breath.
Improving oral hygiene is usually enough to cure bad breath and prevent it recurring.
Your dentist can advise on how to improve your oral health and will recommend you: