Psoriasis Of The Nails

Written by Kimberly Clark
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Very rarely does psoriasis affect the nails without also manifesting itself on the skin. It is generally harder to diagnose psoriasis of the nails, if no symptoms are apparent on the skin. There are, however, a few classic signs that your doctor will look for.

The distinct discoloration of the nails is probably the first sign your doctor will use to diagnose a case of psoriasis of the nails. The infected nails have a tendency to thicken and turn a yellowish color. Salmon-colored patches that resemble blood also commonly appear under the nail.

Additional Signs

Another telltale sign of psoriasis of the nails is the pitting of the nails. Pitted nails are said to look a lot like the surface of a thimble because there are several tiny holes visible in the nail bed. In addition, horizontal lines and white areas may appear on pitted nails.

Detachment or loosening of the nail from the nail bed is also a rather revealing symptom of psoriasis of the nails. This process is called onycholysis. Often, black lines will appear in the gaps between the nail and the nail bed. They are caused by bacteria that have penetrated the nail bed. An additional condition known as subungual hyperkeratosis can cause the nails to lift up and become tender; the presence of a chalk-like substance can often be seen under the nails afflicted with this condition.


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