Hello.. Halitosis (also called as bad breath) is an underlying cause which can arise due to various reasons such as cavities, Gum problems, Mouth, Nose or Throat infections, Dry Mouth (xerostomia), Smoking or systemic diseases. Kingly visit a dentist for definitive diagnosis and treatment. Scaling and polishing is advised. Visit a periodontist for Scaling. During Scaling and polishing, the tartar (calculus and plaque) accumulated is removed, which contains numerous micro-organicism's, responsible for oral health issues. Brush your teeth twice daily using the correct brushing technique. Use a floss. Rinse your mouth after every meal. Maintain proper tongue hygiene. Drink adequate water throughout the day.

Halitosis or smell from mouth could be due to many reasons like less saliva, any deposits on tooth, carious tooth or maybe due to systemic reason like use of certain medicines etc. Need to know full history. Try to maintain good oral hygiene by brushing twice a day, use mouthwash, always rigorously rinse mouth whenever you eat something, warm saline water rinses two to three times a day, drink more water. Still have queries then you can consult me online or offline for better guidance and treatment options.