Scaling will help you. Maintain oral hygiene, brush teeth twice in a day. Use mouthwash. After eating food rinse your mouth. Do flossing. Every 6 months you should visit to dentist for regular check ups.
Next Steps
Visit to dentist and do scaling.
Health Tips
Bad breath is usually related to several reasons so overall health of a person impacts a lot. Eating n drinking things like tea, coffee, acidic drinks, garlic, spicy food etc can cause halitosis. Avoid all these.
Gently brush your teeth twice in a day.
Use mouthwash.
Consult to dentist near you.