I have a birth mark on the back of my neck that over the past few years has became inflammed itchy red dry and flaky ii have used t gel moistures olux foam and several others and nothing works. a doctor told me it was psoriasis but it does not spread

Hard : Hard to tell without a clinical examination so i would see a dermatologist. Eczema and psoriasis are red and scaly but should improve with appropriate treatment. Read more the abcde's of mole evaluation and psoriasis treatment options at the link below. I hope that helps!

A biopsy may clarify: Psoriasis may not necessarily spread over long periods of time, so a lack of spread doesn't rule psoriasis out. A biopsy can help sort out psoriasis look-alikes from the real thing, and a combination of coal tar and light therapy with a dermatologist might clear it up for you.