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The skin weighs an average of four kilograms, covers an area of two square metres, and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin.
The skin weighs an average of 4 kg (8.8 lb), covers an area of about 2 m 2 (22 sq ft), and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are glabrous skin, the nonhairy skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [16]
Injury to the skin can trigger psoriatic skin changes at that spot, which is known as the Koebner phenomenon. [9] The five main types of psoriasis are plaque, guttate, inverse, pustular, and erythrodermic. [5] Plaque psoriasis, also known as psoriasis vulgaris, makes up about 90% of cases. [4]
Acne. What it looks like: Acne causes red, discolored bumps on the skin, along with whiteheads, blackheads, and cysts. Other symptoms to note: Acne is the most common skin condition affecting ...
Frequency. ~20% at some time [2] [4] Atopic dermatitis ( AD ), also known as atopic eczema, is a long-term type of inflammation of the skin ( dermatitis ). [2] It results in itchy, red, swollen, and cracked skin. [2] Clear fluid may come from the affected areas, which can thicken over time. [2] AD may also simply be called eczema, a term that ...
List of autoimmune diseases. Dermatosis in Crohn's disease. Demyelination in MS. PAS stain of lupus nephritis. Autoimmune urticaria. Proptosis in Graves' disease. This article provides a list of autoimmune diseases. These conditions, where the body's immune system mistakenly attacks its own cells, affect a range of organs and systems within the ...
Fitzpatrick scale. The Fitzpatrick scale (also Fitzpatrick skin typing test; or Fitzpatrick phototyping scale) is a numerical classification schema for human skin color. It was developed in 1975 by American dermatologist Thomas B. Fitzpatrick as a way to estimate the response of different types of skin to ultraviolet (UV) light. [2] It was ...
Seborrhoeic dermatitis (also spelled seborrheic dermatitis in American English) is a long-term skin disorder. [ 4] Symptoms include flaky, scaly, greasy, and occasionally itchy and inflamed skin. [ 2][ 3] Areas of the skin rich in oil -producing glands are often affected including the scalp, face, and chest. [ 4]