I had excellent results treating my spider bite with tea tree oil and castor oil! As soon as I knew I had it, I began applying tea tree oil with a Q-tip, being real sure to soak the center of the bite well, letting it dry, then applying castor oil. For three days I also applied one of those "spot" bandaids on which I put another drop of tea tree oil. I have done this twice a day for four days. Today I left the bandaid off, because the pain is all gone, and the center of the bite is dried and healing well. I'm sure it helped that I take several grams of vitamin C daily along with liquid vitamins, minerals, and other supplements every day, but the tea tree oil and castor oil relieved the bite pain and swelling, as well as helping with the healing.