Hello u kunity
The chronic nature of IBS needs to be tackled with some medicines and some dietary changes. You will have to be very regular with diet only freshly cooked meals to be consumed at right time for meals. No fast foods and nothing stale or reheated thing is to be consumed. The constipation part can be checked with non irritant laxatives like isabgol [ psyllum husk ] at bed time.
some time abdominal worms are the irritating cause to trigger IBS , slight intestinal tenderness can be felt in left iliac fossa.
In herbal medicines we use viranga arisht as wormicide and punarnava arisht to get rid of and inflammatory lession and to regulate bowel movement and to stimulate liver to aid digestion.
A herbal combination of aesfoteda lemon and some digestive herbs available in tablet form under name of chitrak vati prevents gas formation and ensures proper digestion. Thereby eradicating causes of irritation of bowel.