Chamomile: Chamomile has been historically used for remedies for multiple ailments, including stomach aches. This herbal plant has been used for a variety of intestinal problems like gas, indigestion, diarrhoea, nausea and vomiting. Chamomile is also used in herbal supplements that relieve colic in babies. Although the gut-soothing effects of chamomile are widely recognised, it still requires more research to understand exactly how it works.