I've got a lot of blood tests ordered and I'm wondering: is it better to get blood drawn when you're feeling better or worse? My symptoms fluctuate a lot and I want to get the clearest picture possible of what's happening with my immune system. Does it matter if I get the labs on a good day or a bad day? Or does it not make any difference? The specific labs in question are: - Lymphocyte subset panel - Immunoglobulins A, M, E - IgG subclass panel - Creatine kinase - Tryptase - C-reactive protein Thanks for your input. I know it's a weird question but I always wonder if labs would be any different if I was feeling better/worse when they were drawn.