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 Flatulence is the state of having excessive stomach and/or intestinal gas (waste gas produced during digestion) that is usually released from the anus with sound and/or odor. 2  Causes of excess gas in the digestive tract are. 3  swallowed air,4  breakdown of undigested foods, 5  lactase intolerance, and. Flatulence is usually not a medical emergency; however medical care should be sought quickly if a person develops other symptoms such as. 2  severe cramps, 3  diarrhea, 4  constipation, 5  bloody stools, 6  fever, 7  nausea and vomiting and/or. 8  right-sided abdominal pain along with flatulence.