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Diseases & Conditions   - Adult Health Library

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Dermatology

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  • Acne

    Acne What is acne? Acne is a disorder of the hair follicles and sebaceous glands. The glands become clogged, leading to pimples and cysts. Acne is very common--people of all races and ages have acne....

  • Acne Scar Removal

    Acne Scar Removal Treatment for acne scars: Specific dermatological procedures to minimize acne scars will be determined by your physician based on: Your age, overall health, and medical history Seve...

  • Anatomy of the Skin

    Anatomy of the Skin Click Image to Enlarge Facts about the skin The skin is the body's largest organ, covering the entire body. In addition to serving as a protective shield against heat, light, inju...

  • Atopic Dermatitis (Eczema)

    Atopic Dermatitis (Eczema) What is atopic dermatitis (AD or Eczema)? Atopic dermatitis (AD), also called eczema, is a hereditary and chronic skin disorder that mostly affects infants or very young ch...

  • Bacterial Skin Infections

    Bacterial Skin Infections The skin is the body's first barrier against bacteria that cause infections. Even though many bacteria live on the surface of our skin, healthy skin can usually protect us f...

  • Baldness (Alopecia)

    Baldness (Alopecia) What is baldness? Baldness, also known as alopecia, is hair loss, or absence of hair. Baldness is usually most noticeable on the scalp, but can occur anywhere on the body where ha...

  • Bed Sores

    Bed Sores What are bed sores? Bed sores (also known as pressure sores or decubitus ulcers) can occur when a person is bedridden, unconscious, unable to sense pain, or immobile. Bed sores are ulcers t...

  • Birthmarks

    Birthmarks What are birthmarks? Birthmarks are areas of discolored and/or raised skin that are apparent at birth or within a few weeks of birth. Birthmarks are made up of malformed pigment cells or b...

  • Blisters

    Blisters What is a blister? A blister is a bump on the skin containing fluid. Blisters are usually circular in shape. The fluid that forms underneath the skin can be bloody or clear. What causes a bl...

  • Calluses and Corns

    Calluses and Corns What are calluses and corns? Calluses are protective pads made up of the thickened upper layer of skin due to repeated rubbing of the area. Corns are small calluses that develop on...

  • Candidiasis (Yeast Infection)

    Candidiasis (Yeast Infection) What is candidiasis? Candidiasis, sometimes called moniliasis or a yeast infection, is an infection caused by yeast on the skin and/or mucous membranes. Although yeast i...

  • Cellulitis

    Cellulitis What is cellulitis? Cellulitis is a deep bacterial infection of the skin. The infection usually involves the face, or the arms and legs. Cellulitis may happen in normal skin, but it usuall...

  • Chemical Peel

    Chemical Peel What is a chemical peel? Chemical peeling uses a chemical solution to improve the skin's appearance. It can reduce or eliminate fine lines under the eyes and around the mouth, correct u...

  • Cold Sores

    Cold Sores What are cold sores? Cold sores are small blisters around the mouth, caused by the herpes simplex virus. The most common strain of the virus is herpes simplex virus 1. Herpes simplex is no...

  • Common Dermatological Procedures

    Common Dermatological Procedures The skin, the largest organ of the body, helps define a person's look. Any unsightly skin appearance, such as scarring, can affect both mental and physical well-being...

  • Common Skin Disorders

    Common Skin Disorders Many common skin disorders require the clinical care of a physician or other health care professional. Listed in the directory below are some, for which we have provided a brief...

  • Contact Dermatitis

    Contact Dermatitis What is contact dermatitis? Contact dermatitis is a physiological reaction that occurs after skin comes in contact with certain substances. The majority of these reactions are caus...

  • Creeping Eruption

    Creeping Eruption What is creeping eruption? Creeping eruption is a skin infection caused by hookworms, which normally are found in dogs and cats. The parasite spreads to humans through skin contact ...

  • Dermatitis

    Dermatitis Dermatitis is an inflammation of the skin. Dermatitis actually refers to a number of skin conditions that inflame the skin. Many types of dermatitis require clinical care by a physician or...

  • Dermatitis Herpetiformis

    Dermatitis Herpetiformis What is dermatitis herpetiformis? Dermatitis herpetiformis (DH) is an intensely pruritic (itchy) skin disease characterized by eruptions of clusters of small blisters or vesi...

  • Describing a Skin Condition

    Describing a Skin Condition How to describe a skin condition A physician may ask you to describe your dermatological condition and its location. Here are some of the more common terms that may help y...

  • Drug Rashes

    Drug Rashes What are drug rashes? Drug rashes are the body's reaction to a certain medication. The type of rash that occurs depends on the type of drug that is causing it. Rashes can range from mild ...

  • Dry Skin

    Dry Skin What is dry skin? Dry skin is a very common skin condition, usually characterized by irritated skin and itchiness. Dry skin often worsens in the winter, when the air is cold and dry. In addi...

  • Erythema Multiforme

    Erythema Multiforme What is erythema multiforme? Erythema multiforme is a skin disorder characterized by symmetrical, red, raised skin areas all over the body. These patches often look like "targets"...

  • Erythema Nodosum

    Erythema Nodosum What is erythema nodosum? Erythema nodosum is characterized by tender, red bumps, usually found on the shins. Quite often, erythema nodosum is not a separate disease, but, rather, a ...

  • Excessive Hairiness (Hirsutism)

    Excessive Hairiness (Hirsutism) What is excessive hairiness? Excessive hairiness, also known as hirsutism, is characterized by abnormal hair growth on areas of skin that are not normally hairy. Altho...

  • Excessive Sweating

    Excessive Sweating (Hyperhidrosis) What is excessive sweating? Excessive sweating, also called hyperhidrosis, can affect the entire body, but usually occurs in the palms, soles, armpits, and/or groin...

  • Folliculitis, Boils, and Carbuncles

    Folliculitis, Boils, and Carbuncles What are folliculitis, boils, and carbuncles? Folliculitis is the inflammation of hair follicles due to an infection, injury, or irritation. It is characterized by...

  • Fungal Infections of the Skin

    Fungal Infections of the Skin Many types of fungal skin infections require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have pr...

  • Generalized Exfoliative Dermatitis

    Generalized Exfoliative Dermatitis What is generalized exfoliative dermatitis? Generalized exfoliative dermatitis is a severe inflammation of the entire skin surface due to a reaction to certain drug...

  • Glossary - Dermatology

    Glossary - Dermatology | A | | B | | C | | D | | E | | F | | G | | H | | I | | J | | K | | L | | M | | N | | O | | P | | Q | | R | | S | | T | | U | | V | | W | | X | | Y | | Z | A [return to top] Ac...

  • Granuloma Annulare

    Granuloma Annulare What is granuloma annulare? Granuloma annulare is a chronic skin condition characterized by small, raised bumps that form a ring with a normal or sunken center. The cause of granul...

  • Hair Problems

    Hair Problems Many forms of hair problems require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have provided a brief overview. ...

  • Home Page - Dermatology

    Topic Index Anatomy of the Skin Skin Tests Describing a Skin Condition Common Dermatological Procedures Common Skin Disorders Skin Growths and Pigmentation Disorders Skin Inflammation (Rashes) Skin I...

  • How Wounds Heal

    How Wounds Heal Most of us take wound healing for granted. You get a small cut, clean and cover it with a bandage, and move on with your life. Yet under that bandage (or in the open air), the body or...

  • Ingrown Hairs

    Ingrown Hairs What is an ingrown hair? An ingrown hair is a hair that curls and penetrates the skin with its tip, causing inflammation. Ingrown hairs are more common among people with very curly hair...

  • Keratosis Pilaris

    Keratosis Pilaris What is keratosis pilaris? Keratosis pilaris is a common skin disorder characterized by small, pointed pimples. The pimples usually appear on the upper arms, thighs, and buttocks. T...

  • Laser Surgery for Skin Conditions

    Laser Surgery for Lesions and Skin Conditions There are many different types of lesions and skin conditions that can be treated with laser surgery. Your physician will decide if you are a candidate f...

  • Laser Surgery Overview

    Laser Surgery Overview What is laser surgery? Laser surgery is a type of surgery that uses special light beams instead of instruments for surgical procedures. How does a laser work? The functioning o...

  • Lice

    Lice What are lice? Lice are tiny insects that can infest the skin anywhere on the body. Lice infection is characterized by intense itching. Lice are highly contagious, spreading from person to perso...

  • Molluscum Contagiosum

    Molluscum Contagiosum What is molluscum contagiosum? Molluscum contagiosum is a viral disease of the skin that causes small pink or skin-colored bumps on the skin. It is not harmful and usually does ...

  • Online Resources - Dermatology

    Online Resources - Dermatology This Web was compiled from a variety of sources including the online resources listed below, but is not intended to substitute or replace the professional medical advic...

  • Other Bacterial Skin Infections

    Other Bacterial Skin Infections What are some common types of bacterial skin infections? The following are common bacterial skin infections: Infection Symptoms Treatment Erysipelas A skin infection c...

  • Other Benign Skin Growths

    Other Benign Skin Growths What are other benign skin growths? As a person grows older and is exposed to sunlight, the skin changes. Most people have some skin marks, such as freckles and moles, which...

  • Other Dermatitis Conditions

    Other Dermatitis Conditions The following are some of the other common dermatitis conditions: Condition Description Symptoms Treatment Localized scratch dermatitis A chronic inflammation of the skin ...

  • Parasitic Infections of the Skin

    Parasitic Infections of the Skin Parasites on the skin are usually small insects or worms that burrow into the skin to live there or lay their eggs. Many types of parasitic skin infections require cl...

  • Pityriasis Rosea

    Pityriasis Rosea What is pityriasis rosea? Pityriasis rosea is a mild, but common, skin condition. Characterized by scaly, pink, inflamed skin, the condition can last from four to eight weeks and usu...

  • Poison Ivy / Poison Oak

    Poison Ivy / Poison Oak What is poison ivy/poison oak? There are three native American plants that collectively may be called poison ivy: Poison ivy Poison oak Poison sumac These plants can cause an ...

  • Pressure Ulcers

    Pressure Ulcers Pressure ulcers, also called bedsores or pressure sores, can develop when you are confined to a bed or chair. When you rarely move, your body weight restricts the blood flow to your a...

  • Prickly Heat

    Prickly Heat What is prickly heat? Prickly heat is a skin rash caused by trapped sweat under the skin. Sweat can become trapped when the narrow ducts through which sweat travels to the surface become...

  • Psoriasis

    Psoriasis What is psoriasis? Psoriasis is a chronic skin condition characterized by inflamed, red, raised areas that often develop as silvery scales on the scalp, elbows, knees, and lower back. Psori...

  • Rosacea

    Rosacea What is rosacea? Rosacea is a common skin condition that usually only affects the face and eyes. Characterized by redness, pimples, and broken blood vessels, rosacea tends to begin after midd...

  • Scabies

    Scabies What is scabies? Scabies is an infestation of mites (tiny insects) characterized by small, red bumps and intense itching. This highly contagious infection often spreads from person to person ...

  • Scars

    Scars What is a scar? A scar is the body's natural way of healing and replacing lost or damaged skin. A scar is usually composed of fibrous tissue. Scars may be formed for many different reasons, inc...

  • Sebaceous Cysts

    Sebaceous Cysts What are sebaceous cysts? Sebaceous cysts are harmless, slow-growing bumps under the skin, often appearing on the scalp, face, ears, back, or groin area. The cysts usually contain dea...

  • Seborrheic Dermatitis

    Seborrheic Dermatitis What is seborrheic dermatitis? Seborrheic dermatitis is an inflammation of the upper layers of skin, characterized by red, itchy skin that sheds scales. A hereditary condition, ...

  • Shingles (Herpes Zoster)

    Shingles (Herpes Zoster) What is shingles? Shingles, or herpes zoster, is a common viral infection of the nerves, which results in a painful rash or small blisters on an area of skin anywhere on the ...

  • Skin Cancer

    Skin Cancer What is skin cancer? Skin cancer is a malignant tumor that grows in the skin cells. In the US alone, more than 2 million Americans were expected to be diagnosed in 2010 with nonmelanoma s...

  • Skin Growths and Pigmentation Disorders

    Skin Growths and Pigmentation Disorders Abnormal skin growths and abnormal pigmentation of the skin may be present at birth, or develop later in life. Many types of skin growths and pigmentation diso...

  • Skin Infections

    Skin Infections Many types of skin infections require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have provided a brief overvi...

  • Skin Inflammation (Rashes)

    Skin Inflammation (Rashes) Many types of skin inflammations (rashes) require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have ...

  • Skin Injury

    Skin Injury External factors can harm the skin, including heat, sharp objects, ultraviolet radiation, and even excessive rubbing or pressure. Many types of skin injuries require clinical care by a ph...

  • Skin Pigment Disorders

    Skin Pigment Disorders What are skin pigment disorders? Skin color is determined by a pigment (melanin) made by specialized cells in the skin (melanocytes). The amount and type of melanin determines ...

  • Skin Sweating Disorders

    Skin Sweating Disorders Sweat glands under the skin produce sweat to help keep the body cool. Sweating increases with warmer temperatures, stress, or nervousness. Sweat consists of water, salt, and o...

  • Skin Tests

    Skin Tests What are skin tests? Skin tests may be performed to diagnose skin allergies, bacterial or fungal skin infections, and other diseases. Skin tests are also performed to differentiate between...

  • Staphylococcal Scalded Skin Syndrome

    What is staphylococcal scalded skin syndrome? Staphylococcal scalded skin syndrome is a response to a toxin produced by a staphylococcal infection and is characterized by peeling skin. The disease mo...

  • Sunburn

    Sunburn What is sunburn? Sunburn is a visible reaction of the skin's exposure to ultraviolet (UV) radiation, the invisible rays that are part of sunlight. The signs of a sunburn may not appear for a ...

  • Surgical Site Infections

    Surgical Site Infections Your skin is a natural barrier against infection, so any surgery that causes a break in the skin can lead to a postoperative infection. Doctors call these infections surgical...

  • Tinea Infections (Ringworm)

    Tinea Infections (Ringworm) What are tinea infections (ringworm)? Different fungi, depending on their location on the body, cause ringworm. It is caused by a fungal infection--not an actual worm. Rin...

  • Tinea Versicolor

    Tinea Versicolor What is tinea versicolor? Tinea versicolor is a common fungal skin infection characterized by lighter or darker patches on the skin. Patches are most often found on the chest or back...

  • Topic Index - Dermatology

    Topic Index - Dermatology Dermatology Home Anatomy of the Skin Skin Tests Describing a Skin Condition Common Dermatological Procedures Acne Scar Removal Treating Aged or Sun-Damaged Skin Chemical Pee...

  • Toxic Epidermal Necrolysis

    Toxic Epidermal Necrolysis What is toxic epidermal necrolysis? Toxic epidermal necrolysis is a life-threatening skin disorder characterized by a blistering and peeling of the skin. This disorder can ...

  • Treating Aged or Sun-Damaged Skin

    Treating Aged or Sun-Damaged Skin What is photoaging? Excessive exposure to the sun early in life can make a person look older than he/she really is. This premature wrinkling and skin damage from sun...

  • Treatment for Skin Cancer

    Treatment for Skin Cancer Specific treatment for skin cancer will be determined by your physician based on: Your age, overall health, and medical history Location and extent of the disease Your toler...

  • Venous Ulcers

    Venous Ulcers When you get a cut or scrape, your body's healing process kicks in to close the wound, and in time, the wound heals. Open skin sores called ulcers, however, may not heal without proper ...

  • Viral Infections of the Skin

    Viral Infections of the Skin Many types of viral skin infections require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have prov...

  • Warts

    Warts What are warts? Warts are noncancerous skin growths caused by the papillomavirus. Warts are more common in children than adults, although they can develop at any age. Warts can spread to other ...