Hi,
How is your friend? Irritable bowel syndrome present with abdominal pain or discomfort in association with frequent diarrhea or constipation, a change in bowel habits, urgency for bowel movements, a feeling of incomplete evacuation, bloating or abdominal distention. Diet modification and medical management are the primary treatment. He should continue his medicines and have regular check-up. With regards to his body odor, this could be caused by the food he eats or underlying medical condition. It is important that direct clinical examination be done for proper evaluation. Do keep us posted. Take care and best regards.