Hi  Welcome to Healthcare Magic Forum  Looks like you had an episode of acute urticaria. This is an itchy condition of skin which leads to redness and development of hives on the skin on itching. In such cases, it is very important to find out the cause of itching. The causes can be varied: any drug intake, Intestinal infection, respiratory infection, thyroid disease, intake of preservative containing food stuffs etc etc..  Hope you are not on any medicines since long term. Pain killers, antipyretics, Antibiotics are the common agents causing itching. You can try if you can find out the pathology.  You might need antihistamines if the condition tends to develop again. So if itching persists, consult a dermatologist for proper evaluation.  Hope it helps , Wishing you speedy recovery . Dr Geetika Paul