Contents. 1  Calf rash AND Forearm rash: Causes of All Symptoms. 2  Calf rash OR Forearm rash: Causes of Any Symptom. 3  Calf rash: Causes.  Calf rash: 1  Introduction. Forearm rash: Causes.  Forearm rash: 1  Introduction. Calf rash and Forearm rash and Behind knee rash (15 causes)  Calf rash and Forearm rash and Finger rash (15 causes) Calf rash and Forearm rash and Foot rash (15 causes) Calf rash and Forearm rash and Groin rash (15 causes) Calf rash and Forearm rash and Hand rash (15 causes) Calf rash and Forearm rash and Knee rash (15 causes) Calf rash and Forearm rash and Kneecap rash (15 causes)
Gas in the digestive tract - the esophagus, stomach, small intestine, and large intestine - comes from two sources: 1  Swallowed air.  Normal breakdown of certain undigested foods by harmless bacteria naturally present in the large intestine, also called the colon.
Many healthy individuals are concerned that they have too much intestinal gas, thinking that their digestive tract could be malfunctioning. While gas in itself is not dangerous, our inability to control its passage might have social implications.Studies have shown that the average person generates 0.6-1.8L of gas per day. This gas comes from two sources, swallowed air (exogenous) and that produced by colonic bacteria (endogenous).Intestinal gas is composed of various amounts of oxygen, nitrogen, carbon dioxide, hydrogen, and methane.Oxygen, nitrogen, and carbon dioxide come from swallowed air and hydrogen and methane are by-products of the breakdown of food residue by good bacteria (probiotics) naturally residing in the colon.hile gas in itself is not dangerous, our inability to control its passage might have social implications. Studies have shown that the average person generates 0.6-1.8L of gas per day. This gas comes from two sources, swallowed air (exogenous) and that produced by colonic bacteria (endogenous).