My cat has diarrhea what should i do? please help!!?

what kind of dry food is she eating? she might be a sensitive kitten to certain brands. make sure she is drinking enough fluids since she does have diarrhea.. take her the vet soon because it isn't normal for a kitten to have it for long and get her a simple blood test to test for feline leukemia (feline aids) that is one of the symptom's of feline aids is constant diarrhea.