Hello, I had a allergic reaction to tea tree oil that I put on my lower left side on my back because I had scrapes on my back from a skiing fall period a couple days later the rash grew and became really red and spread up to about for in until my armpit. I experience swelling in the lower left side of my hip and it has now moved to my genitals. That symptom only started yesterday and the rash started on the 30th of December. Is that normal? I ve been to the hospital and they prescribed K Flex and prednisone to help with a rash. I didn t notice the swelling in my genitals until I got home from the hospital. Please provide insight as to whether I should go back to the hospital or wait until the meds start working. I only started them today. Thank you