R.K.
Take a wash cloth and wring it out in really warm water or put in micro-wave. Put wet washcloth in a plastic bag and put on her tummy. The warmth seems to relax the baby and her tummy muscles. When my babies were little I had a little hot water bottle for this issue but loaned it to a friend and never got it back. :-(
How old is the baby"? Could she be constipated?