Sorry to hear about the problem.
The right doctor for confirming the diagnosis would be a Dermatologist (Skin Specialist). He would do certain tests, maybe blood or skin tests and then let you know as to the cause of this condition and its treatment.
The common things taht come to mind (& I am sure would have been treated by your internist) are Eczema, Lichen SImplex Chronicus etc.
The exact diagnosis requires a dermatological evaluation.
Here are a couple of links that you may find useful.
http://www.nlm.nih.gov/medlineplus/ency/article/000853.htm
http://www.nlm.nih.gov/medlineplus/ency/article/000872.htm
Do let me know if you need more information, please remember to 'accept' the reply if you find it useful; a positive rating & a bonus at your discretion would be appreciated,
Regards
Dr. Gupta
Edited by GauravMD on October 5 2005 at 9:43am

