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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.
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 ...
Specialty. Dermatology. Contact dermatitis is a type of acute or chronic inflammation of the skin caused by exposure to chemical or physical agents. [1] Symptoms of contact dermatitis can include itchy or dry skin, a red rash, bumps, blisters, or swelling. These rashes are not contagious or life-threatening, but can be very uncomfortable.
Seborrhoeic dermatitis 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] It can result in social or self-esteem problems. [4]
Exposing skin to the ultraviolet radiation in sunlight has both positive and negative health effects. On the positive side, exposure allows for the synthesis of vitamin D 3. Vitamin D has been suggested as having a wide range of positive health effects, which include strengthening bones [1] and possibly inhibiting the growth of some cancers.
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 ...
Rosacea is a long-term skin condition that typically affects the face. [2] [3] It results in redness, pimples, swelling, and small and superficial dilated blood vessels. [2] Often, the nose, cheeks, forehead, and chin are most involved. [3]
Hives, also known as urticaria, is a kind of skin rash with red, raised, itchy bumps. [1] Hives may burn or sting. [2] The patches of rash may appear on different body parts, [2] with variable duration from minutes to days, and does not leave any long-lasting skin change. [2] Fewer than 5% of cases last for more than six weeks (a condition ...