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.
What is excessive flatulence or intestinal gas? What causes excessive flatulence or gas? What foods cause excessive gas and/or cause gas pain? List of foods and drinks that may cause excessive flatulence and gas pain; What foods reduce flatulence or gas? What are other causes of excessive flatulence or gas?