what symptoms to look for psoriatic arthritis if you are under treatment for oesteoarthritis and have new skin breakouts that are painful similar to sunburn, blistering or burns on a large area of upper forehead on left side near and above eye that has been painful for 7-10 days but not a usual headache and no bumps or big blisters but it looks like a small rash to smooth area.

Summarized question: What are the symptoms of psoriatic arthritis?