I have red bumps all over my knees and on my thighs. They itch and have puss in them. What is it?

The following sites may be of help to you. I hope that they are.

Leg rash - WrongDiagnosis.com (http://www.wrongdiagnosis.com/sym/leg_rash.htm)

I have a nasty rash on my legs (http://www.netdoctor.co.uk/ate/asthmaandallergy/203513.html)

Rash on Legs - Allergy and Immunology Forum (http://www.medhelp.org/forums/Allergy/messages/59.html)