Tummy troubles

Please pray that mom's stomach is able to be settled.  She has had some really good days lately, but now, some not so good.  The good ones are met with much more joy.  She has been really nauseous, making it hard to eat/drink and then to gain weight.  The doc really wants her to eat more and to increase her calories.  Please pray that this is possible and that her whole digestive system is controlled.  Thank you!