Hello miss .
First of all I want you to consult a Dentist and check for any calculus or tartar deposition on your teeth which a Dentist would know . If it is then get a ultrasonic cleaning done every 6 months in a year . Use a mouthwash recommended by a Dentist .
Secondly even after A cleaning of your teeth u still have bad odour from ur nose and mouth ., Please visit a ENT SPECIALIST . sometimes there will be underlying sinusitis due to which u have bad smell in nose n mouth .
Thirdly check for any particular food item or ingredient which u have been using which is causing this smell . Sometime during to certain food ingredients or sometimes due to particular medicines ( metallic taste ).
Next Steps
kindly visit dentist and sent specialist
Health Tips
brush twice daily using soft brush
use floss after every meal
get a cleaning of teeth done every 6 months .
take steam inhalation. if its causing due to sinusitis .