<s>[INST] Hi, my 5 yr old started getting hives on her face Monday, they went away that night she had a cold as well, they continue to appear and go away throughout week. This evening she had a temp of 102.8 and the hives returned under eyes, now they are appearing on arm, stomach back n back of neck, temp did go down to 101.8 what could this be? [/INST] HI...this is suggestive of toxic urticaria. That means sometimes viral illness can trigger an allergic reaction in the skin. Most important thing to be remembered is that it has a propensity to recur (called as second crop) within 10-14 days. If this happens, you can start using the same medicine, but I suggest you get the kid evaluated with your pediatrician. 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>