I am not on Imuran, but I am on Humira and have been for a couple of years now. I have noticed that I am getting several skin tags even on the inside of my eye. Now I have to see the ompthomologist every 6 months to have that checked. I don't blame the crohns for these, as I have had crohns for over 30 years and this just started happening within the last year. I will mention this to my GI when I see him next.