Hi welcome to the health care magic Excess burp and gas formation can occur from carbonated beverages drinking Other causes are as follow.... -Excess onion, turnip, cabbage like food -less activity and constipation -Excess stress -Smoking -eating too fast -Celiac disease etc... According to cause specific treatment given For functional indigestion fiber supplement can be prescribed Eat more fruits Drink more water and avoid sedentary life style Stop excess carbonated beverages drinking If no improvement noted than USG and other investigation planned Take care Consult physician for examination Hope your concern solved