Milk of Magnesia. I know, it sounds ridiculous but you'll get immediate relief. I realize that you probably won't want to go outside your house w/it all over you but it'll help to heal your skin, too. I discovered it when my son came home from a 10 day stay in the hospital as a baby and he had such bad diaper rash that he had craters in his little bottom. My husband (at that time) was in the AF and we had no extra money and I was out of Desitin diaper cream but I had MOM on hand, so I dabbed it on his bottom w/a cotton ball, he immediately stopped crying and in 2 days the entire rash was gone, so from then on I applied it w/every diaper change. Later on I used it for sunburn and if you get canker sores in your mouth as I sometimes do from acidity, you can use MOM as a mouthwash. Swish it around in your mouth and spit it out. It's amazing stuff.