U require cleaning of teeth at the first place
It may be of two options depends on the amount of plaque and tartar formation and your gums status
Treatment options are
1 Scaling and polishing (normal cleaning of teeth in case of less deposites)
2 Curretage and Root planning (in case of more deposites and givgival and periodontal status (gums) )
Next Steps
Kindly visit ur dentist for clinical and if required radiographical examination to decide the treatment
Health Tips
Maintain oral hygiene (brush twice with proper brushing technique )
Mouthwash chlorhex 1:1 ratio(normal water:mouthwash) 2-3 times a day
Use good quality plastic tongue cleaner to clean ur tongue which is usually neglected and also cause foul smell
Drink lots of water