I was diagnosed with iga nephropathy two years ago an i have always been allergic to cold weather. i think it might be cold urticaria. what shall ido?

Avoid cold : Do you get hives when you go out in cold weather or in cold water? (you can also leave an ice cube on your skin and see if a hive develops) treatment of this can be very challenging- some patients take antihistamines (benadryl, cetirizine, fexofenadine) but their value is unproven. Some (like my wife) simply avoid the stimulus (cold) and this is best but hard if you live where it is cold.