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In case, you do not have major symptoms like fever, loss of weight and appetite, bloody stools, etc. the cause of your symptoms can be Irritable bowel syndrome.
Irritable bowel syndrome (IBS) is a chronic functional disorder characterized by cramping abdominal pain or discomfort with alterations in bowel habits (bloating, constipation, and diarrhea).
IBS does not cause any permanent damage or any serious illness but the symptoms cause severe discomfort & distress affecting an individuals work, ability to travel and attend social events.
Most symptoms of IBS can be controlled with diet, stress management, and prescribed medications (laxatives, antidiarrheals, antispasmodics, or antidepressants).
Medications like activated charcoal (Charcocaps, charcoal tablets) can help to reduce the symptoms of bloating, belching, etc as they absorb the excess gases produced in the intestine.
You may consult with your doctor or your gastroenterologist for a proper diagnosis and treatment.