With hand, foot, & mouth on wed and now on sun she has a fever again, bad smelly diarrhea, uncomfortable, won't eat but is drinking pedialyte. Why?

HFMD. Hfmd is usually not serious. The illness typically runs 7–10 days without medical treatment. Complications are uncommon. Rarely, an infected person can develop viral meningitis (characterized by fever, headache, stiff neck, or back pain) and may need to be hospitalized for a few days. Check with her pediatrician.