<s>[INST] My child has a blister type rash (like diaper rash) that is now spreading up her legs to her knees, as well as bad breath, and a fever of 101+. One of the kids at daycare may have hand, foot, and mouth... could this be what she has, and if so, what can I do to help her? [/INST] Hi... Thank you for consulting in Chat Doctor. It could be any viral erythematous illness. But as you quote them as itchy blisters - the possibilities are Hand Foot Mouth disease/ Chicken pox/ any other trivial viral exanthem. I suggest you use calamine lotion as its giving results along with oral antiallergic like HY Chat Doctor.  Hope my answer was helpful for you.  I am happy to help any time. Further clarifications and consultations on Chat Doctor are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health. </s>