My ND wanted me to use organic cold pressed castor oil packs on my abdomen for assisting in herximer effect. So, after a shower in the evening I would rub castor oil on my abdomen and put a hot pad on my abdomen for an hour or two. In less than six weeks I noticed a scar on my abdomen disappeared! So I started castor oil on my face. I let the steam do the work while in the bathtub or shower I rub the castor oil on the face and let the steam send it deeper into the skin and just leave it on overnight.. I've seen a remarkable decrease in age spots.