Hello, I have had erythema nodosum for three months. I have had numerous blood tests and have been seeing a dermatologist. The only thing that seems to have helped is prednisone. It is getting better, but has been a slow process. I hear in 50% of the cases, there is no none cause. In my case, I believe it was related to stress along with increase standing on my feet. Any addiitonal information on what may help clear it up would be appreciated! Thank you.