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Rarely in conditions like Kartagener's syndrome which is associated with undescended testis
and lung disorder and severe infection like Bronchiectasis
which can cause both in same person. If you have bad breath, you need to use tongue cleaner and gently clean the tongue twice a day. Avoid mouth breathing
which dries the surface of tongue which can cause bad breath. If there is any throat infection
or tonsillitis also there can be bad breath. Any tooth decay or infection in mouth can also cause bad breath. Eat fresh fruits and green leafy vegetables in diet. Avoid much garlic, onions which an cause bad breath and sweat smell. Drink plenty of water. Do brisk walking everyday for 40 minutes for proper circulation. Consult Dentist
for proper examination of your moth to find the cause and treat your problem.