Conversation: The conversation between human and AI assistant.
[|Human|] hi, my 4 year old son has a round circular dry skin patch that is really red on his thigh, and i have just got him out the bath and he has developed them also under his armpit, on his back, bum and behind the knee, the one on his thigh has been there about a week and its quite vigarous and itchy
[|AI|]  Hi... Thank you for consulting in Chat Doctor. By what you quote it should be an urticaria or a simple skin allergy. You can use HY Chat Doctor.  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. But...kin 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.