This is one of those borderline airy-fairy ideas that make sense, sort of: The right side of the body where the liver basically lives. If it's trying to get rid of more hormones & toxins than are being broken down & eliminated, the skin, being the 'third lung' of elimination will try to 'help' the toxins come out. If you're low in enzymes, eat a lot of dairy & flour products that cause mucus to build up, &/or have a bit of sinus stuff, allergies, whatnot, your lymph system tries to flush it out. Sometimes it's too much of a good thing: too much water, too much cleansing inside & out, disencrustation from Fanie products, one side of our body works different from the other, etc. I sleep on my right side too. Perhaps you have a sensitivity to detergent, bleach, or static reliever on your pillow case. Anything silicone, dimethicone, etc. based messes it up for me.