My two year old has had a light spotty rash on his chest and face some on back and now had canker sores on his tongue. Benadryl has not worked. He was dignosed Thursday with a viral infection..Fever up to 104 and down to normal till this morning. if that helps
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.