Hello I appreciate your concern Stomach grumbling or bloating might be related to Aerophagia (swallowing of air) due to use of carbonated drinks, smoking and alcohol ill fitted denture. Another possibility is acid reflux due to stomach hyperacidity. Long standing diarrhoea needs to be evaluated in detail by stool test and blood investigation If you can provide me.more related information like frequency of diarrhoea and it s consistency, I will be able to guide you better. Meanwhile Have lots of fluids including ORS and fruit juices. Loperamide may help you by decreasing intestinal motility and diarrhoea. Thanks for your question please feel free to ask for further queries Best wishes