seborrhea skin and hair. dandruff seborrheic dermatitis. eczema. dysfunction of the sebaceous glands. inflammatory skin

allergy alopecia anatomy anti beauty care closeup dandruff derma dermatitis dermatology disease dry eczema epidermis flake fungus hair head health healthy human illness illustration inflammation inflammatory itch itchiness loss medical medication medicine problem psoriasis scalp scaly sebaceous seborrhea seborrheic sebum secretion sickness skin treatment vector