Prepare a bath as directed on the epsom salt container. Do not use ANY soap, bubble bath, etc in this bath. Soak in it for a couple minutes. Then, using a washcloth, scrub the skin for a minute or so. Soak the area in the bath for 20 minutes. Towel dry. Do this daily or every other day.
I found this out accidentally and I was pleasantly surprised to see it had an effect on my rear-end acne. I've been trying to get rid of it for 2 months! Soap and exfoliators seemed to make matters so much worse. After the first two soaks, the skin appeared softer and no longer red and inflamed. The cyst like formations were going away! I've been doing this for a week now and my skin looks and feels so much nicer now. I still have a few bumps but I bet they will be gone in another week. I hope this works as well for others as it did for me!