From the Remicade prescribing info:
"Psoriasis: Some people using REMICADE had new psoriasis or worsening of psoriasis they
already had. Tell your doctor if you develop red scaly patches or raised bumps
on the skin that are filled with pus. Your doctor may decide to stop your
treatment with REMICADE."
A Medscape article about the problem of skin issues and anti-TNF meds:
http://www.medscape.com/viewarticle/538180
If you can't access Medscape, here's another report about this initially:
http://www.foxnews.com/story/0,2933,152410,00.html