For the past 3 days I've struggled with sleep due to what I thought was kidney ache. Yesterday it was really quite bad (right kidney) and I took pain relief. I have also noticed I have a rash on the right side of my stomach and now wondering if the symptoms are related and it could be shingles? I am 32 and my immune system is suppressed due to a low dose of azathioprine. However, I don't feel unwell, I'm not run down, I don't have a fever.