My guess is the Ascaris parasite...

I have suffered from eczema most of my life and recently noticed that I itch the most at night too. Dr. Hulda Clark 's book " The Cure For All Diseases " says that dry itchy skin and eczema are caused by the Ascaris parasite. I am on day 6 of the Blessed Herbs Internal cleanse (to kill parasites) and since day 2 and everyday I have passed this particular parasite. My skin has gotten softer each day and I have no eczema. I have itched on and off throughout this cleanse but that is part of the healing and actually means you do have a parasite...Right now I feel great! My recommendation would be to try a parasite cleanse if you have not already. It can only do you good in the long run! Good luck!

http://www.blessedherbs.com/index.cgi