Andreas Moritz
I am sorry to tell you that in traditional medicine there is no known cure for this condition. In Ayurvedic medicine, all skin disorders are blood and liver related. I can only suggest to do liver cleansing and then see whether the condition improves. It is certainly possible. My book The Amazing Liver Cleanse (www.1stbooks.com, 1-888-280-7715) provides all the necessary details.
Warm regards
Andreas