I've been diagnosed with the same. I'm currently going through my second flare up. The first was 2 years ago. As you may or may not know, there are multiple symptoms. The first flare up lasted approximately 2 months from beginning to end. My current episode started about 4 weeks ago and is quite severe. I have approximately 20 raised, tender areas covering my calves and feet. The most painful of which are on the edges and bottoms of my feet. I also have pretty severe muscle and joint pain in my lower legs as well as quite a bit of swelling in my ankles and feet. This can be a very painful ordeal to go through, but it does subside with time and the pain can generally be managed with acetaminophin. Originally my doctor suggested Aleve (or Naproxin) but I later discovered that can aggrevate ulcerative colitis which I also suffer from. When the pain was more severe than just Tylenol could handle my doctor was willing to give me something stronger. I have never taken anything else for it. My doctor and I did discuss prednozone, but I DO NOT want to take that unless it's a last result. In my opinion, and I know everyone's symptom's vary, I've found that pain management is most important and with the exception of how ugly it can look
the rest of the symptoms will clear up on their own. Good Luck!
You might also want to check out this page, I've found it very helpful: http://www.emedicine.com/derm/topic138.htm