Flatulence refers to pain or uneasiness caused by build-up of gas in the intestines and the stomach. When the intestines or the stomach is filled with gas, soreness or discomfort would ensue from the pressure. Flatulence is very common among city dwellers. Some may experience persistent sickness in the stomach and some in the intestines, flatulence being one of the symptoms.
Some people with flatulence have other disagreeable symptoms like belching, burping, fullness or passing gas, although these may not be directly related to one another. Passing gas is a normal bodily function. Every person passes gas at least 14 times a day, consciously or otherwise, with a total gas volume of 400-1300mL. However, serious cases need to be tackled with regard to the cause, as with Mr. Cheung, whose daily work and social life are being affected.
Source: Quality HealthCare Medical Services