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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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Phantom vibration syndrome

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


Cryotherapy is a minimally-invasive treatment that freezes skin surface lesions using extremely cold liquid or instruments (eg, liquid nitrogen).


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

Nodular prurigo

Nodular prurigo (NP) or prurigo nodularis is a chronic skin condition characterised by very itchy firm lumps.

Shoe contact dermatitis

Defined by dermatitis on the feet caused by any footwear, shoe contact dermatitis may be an allergic or irritant reaction.

Pitted keratolysis

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

Periorificial dermatitis

Periorificial dermatitis is a common facial skin problem characterised by groups of itchy or tender small red papules.

Pseudoxanthoma elasticum (PXE)

Pseudoxanthoma elasticum refers to rare inherited conditions where abnormal calcification and mineralization of elastic fibres occurs.

Becker naevus

A Becker naevus (nevus) is a late-onset birthmark characterised by a large brown patch and occurs mostly in males.


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

Cholinergic urticaria

Cholinergic urticaria (heat bumps) is characterised by short-lived hives that occur due to sweating.

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...


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

Alopecia areata

Alopecia areata is an autoimmune disorder leading to hair loss.

Cutaneous adverse effects of targeted anticancer therapies

All modalities of anticancer therapy have the risk of causing substantial cutaneous toxicities that can seriously affect a patient’s quality...

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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