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DermNet NZ is the world’s free resource and authority on all things skin. We help thousands of people make informed, evidence-based decisions on how to care for skin conditions, by providing reliable information at the click of a button.

Supported by and contributed to by New Zealand Dermatologists on behalf of the New Zealand Dermatological Society Incorporated.

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Keratoacanthoma

Keratoacanthoma (KA) is a common, rapidly growing, locally destructive skin tumour.

Sjögren syndrome

Sjögren syndrome is an autoimmune disease that causes dry eyes and dry mouth as it mainly affects secretory glands of...

Non-dermatophyte mould onychomycosis

Non-dermatophyte mould onychomycosis (NDMO) is an opportunistic fungal nail infection (onychomycosis) caused by moulds.

Skin conditions relating to HIV infection

Skin conditions conditions are extremely common during HIV infection and will affect approximately 90% of all people living with HIV.

Linear IgA bullous disease

Linear IgA bullous disease is a rare, autoimmune, blistering disease which blisters form on the skin and mucous membranes.

Phytophotodermatitis

Phytophotodermatitis is a skin reaction that occurs when certain plant chemicals come into contact with the skin, and there is...

Erythema palmare hereditarium

Erythema palmare hereditarium (EPH) is an inherited tendency to develop persistent redness of the palms and fingertips.

Contact allergy to hydroperoxides of limonene and linalool

Limonene and linalool are fragrance chemicals extracted from the peel of citrus fruits (limonene) and herbs, flowers, and woods (linalool).

Plant dermatitis

Plant dermatitis is an inflammation of the skin caused by topical contact with a plant or plant constituent.

Fibrous papule of the nose

A fibrous papule of the nose is a common and harmless skin lesion.

Carcinoid syndrome

Carcinoid syndrome is characterised by episodic cutaneous flushing, diarrhoea, and wheezing.

Folliculitis decalvans

Folliculitis decalvans is a chronic, neutrophilic inflammation that results in scarring hair loss.

Azathioprine and mercaptopurine

Azathioprine is an antimetabolite thiopurine analogue drug that interferes with DNA synthesis and suppresses the immune system response.

Laterothoracic exanthem

Laterothoracic exanthem is an uncommon rash involving the sides of the trunk in young children.

Behçet disease

Behçet disease (BD) is a rare, multi-system condition characterised by recurrent painful oral and genital ulcers, a variety of skin...

Childhood infections

Meningococcal disease

Meningococcal disease is an illness caused by the bacteria Neisseria meningitidis.

Measles

Measles is a highly contagious viral infection causing fever and a rash. Early symptoms are like the common cold, with...

Chickenpox

Chickenpox is a highly contagious viral infection that causes an acute fever and blistered rash, mainly in children.

Fifth disease

Erythema infectiosum is a common childhood infection causing a slapped cheek appearance and a rash.

Herald patch: pityriasis rosea
Pityriasis rosea

Pityriasis rosea is a viral rash which lasts about 6–12 weeks. It is characterised by a herald patch followed by...

Impetigo

Impetigo is a common acute superficial bacterial skin infection characterised by pustules and honey-coloured crusted erosions ('school sores').

Boil

A boil (also called a furuncle) is a deep form of bacterial folliculitis (infection of a hair follicle).

Hand foot and mouth disease

Hand, foot, and mouth disease (HFMD or HFM) is a common mild and short-lasting viral infection most often affecting young...

Papular acrodermatitis

Papular acrodermatitis of childhood is a characteristic response of the skin to viral infection in which there is a papular...

Molluscum contagiosum

Molluscum contagiosum is a common viral skin infection of childhood that causes localised clusters of umbilicated epidermal papules.

VIral warts

A viral wart is a very common benign lesion caused by infection with human papillomavirus (HPV).

Head lice

Head lice are small, wingless insects that infest the human scalp.

Scabies

Scabies is a very itchy skin condition caused by a parasitic mite that burrows in the skin surface and results...

Slider: Childhood infections

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