Hi.... Many thanks for consulting with HCM. The description you give suits acute viral diarrhea.. It should settle by itself on zinc supplements & ORS. Hand foot mouth disease suggested by her school requires isolation for 7-10 days along with antiallergics. You should be aware it can cause skin peeling in 4-6 weeks. Hope my answer was helpful for you. Happy to help anytime. Feel free to consult at HCM whenever needed.