Hello
Mouth sours are due to excessive pitta formation in body according to Ayurveda (i.e excessive heat in body )
Pls follow this
Aviod milk and their product
Hot and species food item
Keep your stomch clean (if not clean this also induce mouth sour )
Next Steps
need more details of your case
proper Diet management
life style changes
and some yoga
Health Tips
contact for proper management and life style changes