P.S. - I have read that if you let it go you can have re-occurring eruptions, and can take up to 3 weeks to heal. I'm not into suffering, that's what doctors are for! Go! Might want to take a copy of the description and treatment depending on where you live, my doctor really got a kick out of it, it was like doctor show and tell! He had never seen anything like it, kept my printout for his files. See a post called Pica Pica - got it bad, good link someone posted that I took with.