If you’ve noticed discoloration or thickening in your nails, you may be dealing with nail psoriasis, a finger- and toenail-specific offshoot of the chronic inflammatory skin condition.

and hands. While the exact cause is unknown, a person's immune system, combined with their genes, seems to play a critical role. If someone in your family has psoriasis, there's an increased risk ...

Knowing which kind of psoriasis you have helps you and your doctor make a treatment plan. Most people have only one type at a time. Experts believe psoriasis is an autoimmune disease.