Marked by red, scaly patches, psoriasis can appear on the back of the scalp or neck, Dr. Fromowitz says. What to do: Psoriasis is an inflammatory disease, and a growing body of evidence suggests ...

People with scalp psoriasis often develop thick, crusted plaques or dry, cracked skin with a silvery sheen on the back of the neck. Bites from insects, including mosquitos, spiders, bed bugs ...