your sister is having bad smell from mouth
she is having poor digestion or poor oral hygiene .
you need to improve her digestion .
take cap becosule with folic acid .
visit dental surgeon for scaling and polishing .drink plenty of water .
eat more of fruits and vegetables
rinse with listerine mouthwash .
You should clean your teeth by dentist.many reasons of bad breath also like acidity , sinusitis, tonsilitis . Better to consult Dr and do mouthwash like betadiene regulerly also clean your tongue with tongue cleaner.
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