If a patient with chronic psoriasis suddenly develops severe joint pain and pain in the thighs around the age of 40, what disease is indicated?

Psoriatic arthritis: We would consider psoriatic arthritis as a possible cause. Like the golfer phil mickelson you could have psoriasis for many years and then develop psoriatic arthritis. The thigh pain could come from hip joint involvement. Your evaluation will help clarify these possibilities.

Psoriatic aches: Could be psoriatic arthritis. See your primary care doctor or a rheumatologist. There are effective medication approaches that many people find helpful.