Your history and the symptoms mentioned indicate that you may be having Irritable bowel syndrome.
Irritable bowel syndrome (IBS) is a chronic functional disorder characterized by abdominal discomfort with alterations in bowel habits (bloating, constipation, and diarrhea).
Lack of major symptoms like fever, loss of weight and appetite, bloody stools, etc. in your case does rule out other causes of abdominal pain like - inflammatory bowel disease, malabsorption syndromes, lactose intolerance, parasitic infestations, etc.
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 might consult with your doctor or your gastroenterologist for a proper examination and treatment.
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