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Nail Psoriasis
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The characteristic signs are tiny white pits scattered in groups across the nail. Toenails and sometimes fingernails may have yellowish spots.
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Long ridges may also develop across and down the nail.
The nail bed often separates from the skin of the finger and collections of dead skin can accumulate underneath the nail.
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Over half of patients with psoriasis have abnormal changes in their nails, which may appear before other skin symptoms. In some cases, nail psoriasis is the only manifestation of psoriasis.
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Generalized Erythrodermic Psoriasis (also called psoriatic exfoliative erythroderma)
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This is a rare severe and form, in which the skin surface becomes scaly and red.
The disease covers all or nearly all of the body.
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About 20% of such cases evolve from psoriasis itself. It can also be caused by certain treatments of psoriasis.
This condition can also erupt after withdrawal from other agents, including corticosteroids or synthetic antimalarial drugs.
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Pustular Psoriasis
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Patches become pus-filled and blister-like. The blisters eventually turn brown and form a scaly crust or peel off.
Pustules usually appear on the hands and feet. (When they form on the palms and soles, the condition is called palmar-plantar pustulosis.)
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Pustular psoriasis may erupt as the first occurrence of psoriasis or it may evolve from plaque psoriasis.
A number of conditions may trigger pustular psoriasis, including infection, pregnancy, certain drugs, and metal allergies.
It can also accompany other forms of psoriasis and be very severe.
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