Skin diseases and abnormal conditions

Acne

Chronic papular and pustular eruption of skin associated with increased sebum production.

Acne vulgaris

Acne caused by buildup of sebum and keratin in skin pores.

Abscess

Localized collection of pus.

Pyoderma

Pus-producing skin condition or infection.

Cellulitis

Inflammation and infection involving the skin and underlying soft tissue.

Impetigo

Contagious bacterial skin infection with characteristic lesions and crusting.

Dermatitis

Inflammation of the skin.

Atopic dermatitis

Inflammatory skin condition associated with an atopic tendency.

Eczema

Inflammatory skin disease that can produce redness, itching, papules, and other lesions.

Seborrheic dermatitis

Inflammation associated with oily, flaky skin; commonly called dandruff when affecting the scalp.

Psoriasis

Chronic, recurrent skin disease marked by red patches covered with silvery-gray scales.

Tinea

Fungal infection of the skin.

Tinea pedis

Fungal infection of the feet; athlete's foot.

Tinea corporis

Fungal infection of the body; commonly called ringworm.

Dermatophytosis

Fungal infection caused by dermatophytes.

Mycosis

Fungal infection.

Onychomycosis

Fungal infection of the nails.

Onycholysis

Separation of the nail plate from the nail bed.

Paronychia

Inflammation and swelling of the soft tissue around a nail.

Ichthyosis

Condition in which skin is dry, rough, and scaly.

Keratosis

Abnormal condition involving an increase or thickening of keratinized tissue.

Actinic keratosis

Thickening of the epidermis associated with sun exposure.

Callus

Thickening of the keratin layer due to repeated pressure or friction.

Keloid

Thickened, overgrown scar tissue.

Cicatrix

Scar.

Scleroderma

Chronic disease marked by hardening and shrinking of connective tissue in the skin.

Systemic lupus erythematosus (SLE)

Widespread inflammatory disease that can affect joints and skin and may produce a butterfly-shaped facial rash.

Discoid lupus erythematosus (DLE)

Form of lupus that primarily affects the skin.

Gangrene

Necrosis or death of tissue resulting from inadequate blood supply or other causes.

Decubitus ulcer

Pressure ulcer or bedsore caused by prolonged pressure.

Scabies

Contagious parasitic skin infestation associated with intense itching.

Urticaria

Hives; raised, swollen skin lesions often associated with an allergic reaction.

Leukoplakia

White plaques on a mucous membrane, such as inside the mouth.

Causalgia

Intensely unpleasant burning pain associated with nerve damage.

Epidermolysis

Loosening or separation of the epidermis, sometimes with blister formation.

Seborrhea

Excessive secretion from sebaceous glands.

Pilonidal cyst

Cyst in the sacral region that may contain hair.