I have had this crazy allergy since I has 11 years old. Although it took about 6 years for us to figure out what caused it. I have never heard of anyone that has this same allergy. The rash is not only itchy but very painful sometimes i have it on my legs sometimes on my arms and fingers. And sometimes, to my horror, on my face. It lasts about 4 to 5 days, but the dark spots I get after it drys up take about 3 weeks to go away. The strangest thing, however, is that after I got married and started using birth control it suddenly went away. I've been off of birth control for about a year an a half now but the allergy didn't come back until now … that I'm pregnant. All I want to know is if there is anyone out there that has seen or heard of an allergy like this before and if you have has any doctor ever given any explanations for it. Thanks!