Toenails that are discolored yellow could ... About 80 to 90% of people with plaque psoriasis will develop nail psoriasis. "Patients with nail psoriasis often have thick nails, with the lifting ...

scaly plaques to form on the skin. About half of all people with psoriasis exhibit symptoms of the condition on their nails. Symptoms occur more frequently on the fingernails than the toenails.