Smell or bad odour from your cap may have various reasons , like food lodgement between the gums and your cap, infection in your gums , infected tooth There are various reasons of food lodgement
To know the exact reason , we need to assess you clinically and we will need some X-rays , for which you will need to visit a dentist .
Next Steps
Visit a dentist as soon as possible and get a correct diagnosis done.
Health Tips
Use floss everyday .