It may be due to indigestion..if you want a immediate result then you can go with panchakarma .
If not you can take the following medicine
Agnitundi vati 2-0-2 before food
Amrutottara kashaya 15ml twice a day after food with 45 ml of water
Next Steps
drink hot water regularly
avoid curds junk and oily food strictly
Health Tips
for any query you can consult online.
Thank you