Hi
yellow teeth can be because of lot of reasons. They may be some internal stains which can be treated by bleaching (whitening) or they may be external stains which can be removed by scaling (cleaning) of teeth.
Bad odour may be because of lot of factors but the way you are describing it, please go for a cleaning of teeth and also increase your water consumption, as drying of mouth may give a bad odour.
Suggestions offered by doctors on Lybrate are of advisory nature i.e., for educational and informational purposes only. Content posted on, created for, or compiled by Lybrate is not intended or designed to replace your doctor's independent judgment about any symptom, condition, or the appropriateness or risks of a procedure or treatment for a given person.
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