text: Depending on how severe it is, you should consult a physician.  It can leave permanent scarring.\n\nYou should wash it (before blisters break out) and keep it from being exposed to sunlight for up to 2 weeks. \n\nCold compresses are recommended.\n\nHere's a site that talks about it, somewhat. Mostly the 2nd half of page 1, continued on page 3.