Bad oral hygiene can lead to sour taste. Excess use of tea, caffeine, cocaine and tobacco can cause sour mouth. Injuries to nerves or brain can lead to sour taste. If you are suffering with depression, stress disorders or anxiety, it may also be a cause of sour taste in the mouth.
Health conditions. Certain health conditions can cause symptoms of flatulence, including: 1  indigestion. 2  constipation. 3  irritable bowel syndrome (IBS) â a common digestive condition, which can cause stomach cramps, bloating, diarrhoea and constipation. 4  coeliac disease â an intolerance to a protein called gluten, found in wheat, rye and barley.
This article provides some information about flatulence, its causes and remedies. Excess gas in the stomach or intestines causes bloating, belching, or flatulence. Swallowing air through the mouth is the major reason for accumulation of gas in the stomach. Gas is produced in the colon, when bacteria break down undigested food. Intestinal gas is nothing but a mixture of oxygen, nitrogen, carbon dioxide, hydrogen, and methane.