I have a case of poison ivy that isnt going away.  it started on my face and i got prednizone right away from my doctor. it stayed on my face and part of my neck for a few days then it randomly started to apear all around my waist. it  also showed up in little dots on my leg and arms. why does it keep comming back? i have used zanfel and technu numerous times to try and stop spreading and itching but it doesnt seem to be working. also when i itched the patches on my waist (i know its bad) it seemed to spread and now it is on my stomach a little too. why does that happen? if i itch does it keep coming up so if it dont itch at all will it go away? please help me