Psoriatic arthritis is a form of arthritis that occurs in patients with psoriasis. The disease occurs like red skin swellings and patches with silver scales as the body toppings. The disease is also named as psoriatica, arthropathic psoriasis/psoriatic arthropathy. The frequency of the disease in psoriasis patients are 5% or less. The joint inflammatory disease is considered as an immune system disorder. This dreadful skin disease causes scaly rashes, itchy, and crumbling nails also.