I just got poison oak 3 days ago and its winter!!!.I have used rubbing alcohol and an oatmeal bath from the store 2 times a day. Also I put ice cubs on it and soak it in cool water a couple of times each day.Putting a cool rag over your face and sitting under a fan works too. I have found that it is very bad to sleep on because it swells up over night, so you have to kind of sit up when you sleep and dont lie on your cheeks if its on your face. This seems to be working for me because its clearing up rather fast. Keep putting ice packs on it for relief and change your pillow case every night!
Good luck and I feel bad for anyone who has it because its hard to live with!