Hello Bad odour or bad smell is most of the times due to pyorrhoea or gingival disease that needs a proper round of teeth scaling and polishing, professional dental care is needed now. You cannot treat it at home. You need to visit your dentist and get teeth cleaning done, after that some instructions will be given to you such as a mouthwash which you will have to use for a couple of days that will help relieve your problem and also maintain the health of your gums

I agree you are brushing regularly,but still some food deposition take place between the teeth and also on their lingual side . So cleaning of teeth in dental clinic is needed.

Bad smell from mouth can be due to 1. Plaque and calculus deposit around your teeth. 2. Pyorrhea( Advanced form of gum disease where gums bleed while brushing) 2. Gastric issues 3. Active dental cavities Visit your dentist for a checkup so that the reason for bad smell is clear. Then your dentist will advice you the best treatment available.  Mostly we advice a thorough professional ultrasonic cleaning of all the teeth followed by using mouthwash.  You can maintain it by getting dental checkup done every 6 months.

Welcome to practo, the bad breath can be due to calculus deposits or any other gastric related disease I advise you to do scaling once take Vitamin C rich foods use mouthwashes do dental floss the bad breath will gradually subside there is a particular brushing technique consult me  for further details thank you.

Bad breath can be caused due to multiple reasons.Proper history and physical examination necessary to find the cause. You need to get scaling and polishing done every 6months by dentist as routine brushing won't clean pockets in  gums.

There are several reasons for bad breath -bad oral hygiene/ tartar accumalation - tooth decay - gum infection - neglected tougue cleaning - sinusitis - cold / cough / tosilitis - stomach concerns/ acidity/ indigestion - high carbohydrate/ sugar in the diet

Reason of bad smell can be many. Should find out the reason and treat accordingly. Causes can be Dental caries, abscess, hard deposits in teeth, acidity and/or many more.