<s>[INST] hi ,My son is 7yrs 9 mnths.He has got cough since a week and is feeling very tierd today ,He has got 4 blisters on his body They r not water filled blisters ,they look  a bit scabby .They r  a bit itchy too.He has no fever.R they chicken pox??? One child in his class has got them a week ago.please advice thank you. [/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. Skin conditions are best diagnosed only after seeing directly. I suggest you to upload photographs of the same on this website, so that I can guide you scientifically. 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>