Today I learned from a very good dermatologist that I have Seborrheic Dermatitis. It seems so similar to Psoriasis! Have circle above right ear on scalp that itches, has chronic buildup, oily, and large flakes with itching. Have salmon colored rash in left armpit. Doctor is giving me stronger medicated shampoo and medicine than the internal medicine doctor gave me (it improved, but did not go away). My heart goes out to those who have Psoriasis. Heard this can turn into Psoriasis. Is there any way I can prevent that? Thank you very much for your input.