A trip to an allergist for a DepoMedrol or Decadron shot and a script for prednisone as soon as symptoms occur will greatly minimize a systemic flare-up to other parts of the body and clear up of all symptoms in as little as 3-5 days is not uncommon. The long acting effects of the shot will prevent allergic reactions for up to 6 weeks. In the summer when I do yard work and outdoor activities I get a shot every 6 weeks or so to prevent reactions and if any occur a weeks dose of prednisone prevents the rash from spreading. Cleaning the affected area with rubbing alcohol and applying an over the counter cortizone type cream 4-5 times a day helps heal any lesions quickly.
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