Hi There are several reasons for bloating of the stomach and the common cause is Acid reflux/Gastritits/Dyspepsia The best way to prevent the same is to have meals on timely interval Preferred to have the break fast in large quantity and then followed by medium meal in lunch and mini meal for dinner Avoid spicy food as much as possible Avoid Coffee - as it is a gastric irritant Do regular exercise/walking for 45 minutes and meditation for atleast 48 minutes(which will relieve you from any stress-as stress also contributes to gastritis) Consume diet with plenty of fibre(green leafy vegetables etc) and drink plenty of fresh fruit juice, tender coconut and water If I were your treating doctor would have prescribed some antacid tablets like Ranitidine 150 mg hour hour before meals two times daily (morn and night) for 10 days For your bad tail bone pain, avoid sitting for a long time and take regular breaks atleast once in a hour and can apply local pain relieving gel like Diclofenac/Pyroxicam gel Use soft pillow on the chair you are sitting Wish You Good Health Regards Dr Sridhar K