Hi and welcome. I will try to help you as much as I can. Yes,this is normal,since anal sfincter relaxes during massage as well so flatus may be expelled involuntary. However n case of excessive bloating it may be sign of food allergy, hatal hernia ,IBS or inflammatory bowel diseases. So you should do gastroenterologic work up but first try to change your dietary habits, it means: eat smaller meals but more frequently, avoid fried and spicy food, take menta tea, avoid alcohol and coffee, eat probiotics and milk products, boiled food and vegetables. Also, there are medications such as Flobian,Magnesium oxide or certain axatives which may relieve such symptoms. I hope I have answered you query. If you have any further questions you can contact us in every time. Kindly regards. Wish you a good health. DR. Ivan Rommstein