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DermNet (previously DermNet NZ) is the world’s leading free dermatology resource. 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.

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Melanoma

Melanoma (malignant melanoma) is a potentially serious type of skin cancer, in which there is uncontrolled growth of melanocytes.

Congenital cartilaginous rests of the neck

Congenital cartilaginous rests of the neck are rare, benign, congenital anomalies that likely represent branchiogenic malformations

Keloids and Hypertrophic scars

Keloids and hypertrophic scars occur as a result of excessive scar formation.

Angular cheilitis

Angular cheilitis is a common, non-contagious, inflammatory condition affecting the corners of the mouth.

Skin signs of coma

Coma is a state of prolonged unconsciousness; assessment of the skin may provide a diagnostic clue as to the cause...

Hand, foot, and mouth disease

Hand, foot, and mouth disease, usually caused by a coxsackie virus, is a common, mild viral infection often affecting young...

Paraneoplastic pemphigus

Paraneoplastic pemphigus (PNP) is a rare, autoimmune, mucocutaneous, blistering disease that is almost always associated with a confirmed or occult...

Staphylococcal scalded skin syndrome

Staphylococcal scalded skin syndrome (SSSS) is a rare, severe, superficial blistering skin disorder which is characterised by the detachment of...

Angioedema

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

Pitted keratolysis

Pitted keratolysis, also known as ringed keratolysis, is a superficial bacterial skin infection characterised by crater-like pits and malodour.

Phantom vibration syndrome

Phantom vibration syndrome (PVS) refers to the false perception that one’s mobile phone or other technological device is vibrating when...

Antiperspirants

An antiperspirant is a chemical agent that reduces perspiration or sweating.

Lobomycosis

Lobomycosis is a rare, chronic, fungal infection of the skin and subcutaneous tissue.

Vitiligo

Vitiligo is an acquired, chronic, depigmenting disorder of the skin, in which pigment-producing cells are progressively lost.

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...

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

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, self-limiting, viral infection that causes blisters on the hands,...

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

Slider: Childhood infections

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

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