Characteristically, they present as patches of red, flaking, greasy skin, particularly on lipid-rich areas of the skin such as the scalp, nasolabial folds, ears, eyebrows,
[web.archive.org]
[…] seborrheic keratosis a skin condition characterized by circumscribed wartlike lesions that can be itchy and covered with a greasy crust seborrheic dermatitis a chronic skin
[vocabulary.com]
Warts may appear and skin is often oily or greasy. These skin lesions are sometimes mistaken for cancerous growths and tend to appear predominately during middle age.
[rarediseases.org]