Again...so glad to find this site and be able to get my fave Watkins products. I love this stuff, you can use it for anything that needs healing AND I remember a very long time ago being absolutely fixated on my son's blackhead, to the point where he would run away everytime I came near..I put the petrocarbo on it ( in his ear) and it sucked the bad boy out! I was thrilled and my son was relieved. LOL! For split feet etc. it works wonders, too. We will be taking the petro and medicated ointment on the El Camino this year!