Hello, Welcome and thanks for posting your query to Healthcare Magic. After reading your query it appears the possibility of Urticaria . Urticaria is a common condition caused by bursting of allergy producing cells known as mast cells . As the chemical inside them is released it produces a rash which you have mentioned. There can be multiple factors producing this condition which are included in day to day life and some times it is really difficult to find one exact cause. In your case you are correlating it with contact with cats. So it is better to stay away from the offending factors. For the betterment kindly follow the suggestions below: -Apply over the counter calamine lotion 3-4 times a day. -You can do cold water compresses to reduce the intensity of itching. -Do not scratch or rub the skin as it can lead to further aggravation. -You can take oral anti histamine like loratadine or levocetrizine under medial advise. Despite above measures if the problem is not getting better then it is better to consult a dermatologist for best guidance. Hope these informations will help. With good health wishes Dr Sanjay Kumar Kanodia MD (Dermatology & STDs)