seborrheic dermatitis inflammation of the oil/sebaceous glands; increased sebum production contact dematitis acute inflammation response of the skin triggered by a chemical/substance; causes redness, welling, vesicles that ooze itch burn/sting Atopic dermatitis (Eczema) chronic inflammation of the skin; rash occurs in face, neck , elbows, knees, and upper trunk of the body along with itching Urticaria (hives) severe itching followed by redness and an area of swelling (wheal) in a certain area angioedema A condition characterized by regions or areas of subcutaneous swelling due to allergic reaction to food or drugs psoriasis chronic condition where thick, flaky, red patches of various sizes covered with white, silvery scales; inflammatory and chronic; may be autoimmune rosacea chronic inflammatory disorder of the facial skin which causes redness, primarily in the areas of blushing/flushing comedones also called blackheads; masses of sebum trapped in the hair follicles acne vulgaris inflammatory disease of the sebaceous glands and hair follicles. Papules, pustules, and comedones are present macule A circumscribed, flat, nonpalpable change in skin color