Hi deeleachman. I can't personally speak to the psoriasis being able to cause this issue and for your protection we cannot give medical advice over the internet. I do know that prednisone (or steroids in general) can cause what is often referred to as a "buffalo hump" at the base of the skull/neck area. Your doctor should be able to give you more information about this and whether any of your medications could play a role. Wishing you the best and please keep us posted on how you are doing. Richard (PlaquePsoriasis.com Team)