I get small hives on my skin mostly on legs, arms,feet and buttocks after a day or two from last four weeks .they get suppressed after taking cetirizine but appear again after one or two days. I can't understand the actual reason for them but feel that eating gassy foods may be reason. But problem is why they have started happening now ,i have been eating all types of food always. Now since its four weeks ,this is worrying me. Please suggest me what to do.