Sorry for the sufferings.
The symptoms can be due to a few possibilities.
This can be due to psoriasis.
The other possibilities are fungal infection, dermatitis
In fungal infection of the foot you will need long continued antifungal medicine, often oral medication is required too.
An examination by a dermatologist needs to be taken.
A testing of the skin scraping can be needed to pin point the diagnosis.
Treatment will vary according to the diagnosis.
Long term treatment may be needed.
I hope this information helps.
Happy to assist, if you need any clarification.
Please feel free for any follow up query.
Edited by Dr .Saha on 4/6/2010 at 4:10 AM EST