Hi.. Welcome to HCM.. So sorry to hear about your problem and will try my level best to resolve it to the best of my knowledge and understanding.. As per your complain bad breath also known as Halitosis can occur due to a number of causes like: -Poor oral hygiene. -Oral and dental infections. -Tonsil stones or tonsilloliths. -Digestive disorders. -Post nasal drip. -Sinusitis. -Acid reflux,. -Respiratory infections. -Diabetes etc.. In your case poor digestion can be a culprit as well as you need to get evaluated for other causes like diabetes considering your age.. You should consult an Oral Physician or an Otolaryngologist and get evaluated and a thorough clinical evaluation and investigations depending upon suspected cause can help in diagnosis.. Treatment of underlying cause will relieve the symptoms.. As of now you should start gargling with a flavoured mouthwash twice a day.. You should chew flavored sugarfree chewing gum.. Do warm saline gargles twice a day.. Limit the intake of high aroma foods like onion and garlic.. Drink plenty of water and maintain a good oral hygiene.. Hope this helps.. Regards.