Whether it’s morning breath, garlic breath or curry breath, there is often an easy way to bust bad breath. But sometimes, it can linger a little longer than we’d like.Not sure if your breath smells? Lick the inside of your wrist, wait ten seconds and sniff. If the smell is bad, it’s a key indicator you have bad breath.Common causes of persistent bad breath are poor oral hygiene, especially if you have areas where food often gets stuck after eating, as well as gum disease, dehydration, hunger or digestive issues, a postnasal drip or a tonsil infection.Dr Jasmine Piran, clinical director at SmilesbyJasmine in London, says: ‘Smelly gases released by the bacteria that coat your teeth, gums, and tongue contain volatile sulphur compounds (VSCs) which are often responsible for ongoing bad breath if all other possible causes have been eliminated.’She adds: ‘The bacteria on our teeth and gums form a creamy plaque layer around the gums and teeth which can harden to form tartar.