look in to your dietary habits first.this is a sympyom of improper digestion of food .agni mandya is the cause.to clean the bowel firstly i would advice eranda taila virechan.properdosage from an expert is recommended.then in medicinal treatment i would advice triphala mashi.hingvashtak curna.rasone vati .diet restriction only homemade light diet comprising of moog dal,rice,homemade ghee,roti,butter milk impregnated with hing,jeera ,saindhav,is to be continued of cosiderable period until agni comes to its normal function.eating of raw garlic 2 to 3 pieces during lunch and dinner eaten with in a piece of roti to prevent burning in oral mucosa should be done.