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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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Lichen planus

Lichen planus is a chronic inflammatory skin condition affecting the skin and mucosal surfaces.

Alopecia areata

Alopecia areata is an autoimmune disorder leading to hair loss.


Primary cutaneous amyloidosis (PCA) encompasses a group of skin conditions characterised by deposition of amyloid protein, without internal organ involvement.

Systemic amyloidosis

Systemic amyloidosis is an uncommon disorder in which misfolded proteins accumulate in bodily organs; cutaneous manifestations only arise from the...


Monkeypox (MPV) is a disease caused by the DNA monkeypox virus that often causes 'flu-like' symptoms and a rash similar...


Trichoscopy involves examination of the scalp and hair using a handheld or a videodermoscopy device.


Angioedema is red painful swelling in the subcutaneous tissue, triggered by an allergic reaction or medication.

Polymorphic light eruption

Polymorphic light eruption, also known as polymorphous light eruptions, is a seasonal photodermatosis occurring in spring and early summer.

Skin reactions to COVID-19 vaccines

There are a spectrum of skin reactions following COVID-19 vaccination including local site reactions, urticaria, a delayed large local reaction...


Rosacea is a chronic facial rash that most often starts between the age of 30 and 60 years.

Generalised eruptive keratoacanthomas

Generalised eruptive keratoacanthoma of Grzybowski (Grzybowski syndrome) is a rare variant of keratoacanthoma characterised by the presence of hundreds to...

Plasma cell mucositis

Plasma cell mucositis is a rare, benign, inflammatory disorder of the upper aerodigestive tract that shares clinical and histologic features...


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

Keratosis pilaris

Keratosis pilaris is a very common, harmless form of bumpy dry skin characterised by plugged hair follicles.

Lichen planopilaris

Lichen planopilaris is an uncommon inflammatory condition that can lead to permanent hair loss.

Childhood infections

Meningococcal disease

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


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


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 is a common, superficial, highly contagious bacterial skin infection characterised by pustules and honey-coloured crusted erosions.


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 is a transmissible skin disease caused by the ectoparasitic mite Sarcoptes scabiei var.

Slider: Childhood infections

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