Side effects of not clearing is more  so take plenty of warm water   adv stool exam  let me know  age  to give strong medicine

She can have intermittently ... She seems to have IBS ...needs to take her history in detail Its better take online consultation for her problems

Gall bladder stores digestive juice called as bile, which helps in the digestion fat that is taken in the diet. As your sister has no gall bladder, she is unable to digest fat in her diet, so any fat that she eats, will not be digested, and will produce all the symptoms that you mentioned. To improve her situation she should if possible avoid fats or significantly lower it down from her diet. Other things is she should increase the fibre content in her diet and consume more adequate water. Other issue what she is at risk is fat soluble vitamin deficiency such as vitamin A, E, D as they are not absorbed from her diet. She should take once a month multivitamin injections containing all the fat soluble vitamins.