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.
1 Stomach bloating and pain is usually caused by a nuisance of air bubbles produced by our bodies. 2  Intestinal bacteria produces gas during digestion. 3  Sugar can be the culprit of your flatulence problems. 4  Sugar sweeteners like sorbitol and fructose will sometimes initiate the uninvited stomach indigestion problems.ases are formed in the intestines which may lead to stomach indigestion and bloating. When there is stomach flatulence, there is sometimes cramping which leads to intestinal gas and stomach belching. Some may believe that swallowed air is the reasoning behind stomach flatulence.