First of all thank you for your reply! Let me be clear about the reasons I made this post.In the last coupIe of years I have developed some symptoms that I can't really explain.Those symptoms are rosacea,hemorrhoids,severe eczema in both my hands(only during winter),some mosquito bites like pimples that they apear usually after I take a bath or in my inner tights after I walk for a while.And I allways have cold hands (more than the average and acdeptable) that they turn a litle ''purple'' if I stay in the cold for some time.But of course as you said if it was a case of cvid it wouldnt be treated by a simple steroid.I will take the alergy test.May I ask what kind of blood test do I have to do in order to check if my immune system works fine producing all the normal antibodys?