Sooooo very glad I found this! I am suffering my 10th day of itchiness. I know the woman in the article didn't experience the itch, but I think my immune system kicked in causing an allergic reaction as well. My right eye was swollen! I had the streaks and red bumps all over. The rash is fading now. I ate raw shiitake mushrooms two days in a row and got the rash on the 3rd day. It started on my forearms, my eye, and my neck. The welts on my torso and back showed up the next day. I also had welts on my shoulders, behind my ears, my face, hairline, and one down my nose. I don't have health insurance so I haven't seen a doctor. Antihistamines helped somewhat with the itching. A hot shower provided the most relief. I hope this itching goes away soon. Not at all intense, but annoying nontheless.