Feeling sick. Kidney stone often forces an ill person feel sick. Sometimes vomiting is a natural reaction of your organism to the severe discomfort it feels. Having stones in kidneys is the source of painful sensation. This is how your body tries to get rid of toxic elements your kidney is not able to remove. If your kidney is healthy, those toxins will be pushed out a natural way. But if a stone breaks this mechanism, your body will try to push it another way.