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 are upset bowels? Upset bowels are a common way that people describe any bowel problems where there is diarrhea, abdominal cramping or pain and/or excessive gas (flatulence) among other symptoms. It can be acute or chronic. The more common acute upset of the bowels occurs with food poisoning and gastroenteritis.