The cause is always of first important to discover if possible
having said that tea is my go to:
My first choice would be green tea with ginger and honey (ginger is a digestive aid , green tea has less caffeine than black and many good qualities)
Another great choice is chamomile known to sooth upset stomachs with just a bit of mint ( I use spearmint because peppermint is too strong for me but peppermint is used by many)
The act of sipping a warm liquid in itself is soothing to the irritated lining of the stomach.
