I get sudden big mosquito bite like rashes all over. For example, It suddenly start itching and I see whole leg is full of these rashes. I am sitting suddenly I feel sensation around my lip and cheeks and they swell. My hands suddenly swell with too much of itching and becomes very hot. I feel itchy bumps in my scalp. Even my inner throat and tongue is also affected. I have been relieving these by cetrizine but now when its getting worse and I am getting these allergy eshe regular, I am worries. I have sen these keep occurring without any reason. If I eat, I don't eat I go out, I don't go out. In everything situation I get these. Please help on urgent basis.