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DermNet™

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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Sulphonamides (sulfa drugs) and the skin

Sulphonamides can be categorised into sulfonamide antimicrobials and sulfonamide non-antimicrobials.

Children’s Dermatology Life Quality Index (CDLQI)

The Children’s Dermatology Life Quality Index (CDLQI) is a questionnaire designed to measure the impact of skin disease on the...

Dermatology Life Quality Index (DLQI)

The Dermatology Life Quality Index (DLQI) was the first dermatology-specific quality of life questionnaire, first published in 1994 by Professor...

Phototesting

Phototesting comprises several investigations that are undertaken to determine if a patient has a skin condition caused or aggravated by...

Otitis externa

Otitis externa, also called external otitis or ‘swimmer’s ear’, is a common inflammatory condition of the external auditory canal (the...

Capsaicin

Capsaicin is a topical analgesic used for symptom relief in osteoarthritis and some neuralgic conditions such as post-herpetic neuralgia.

Pimecrolimus

Pimecrolimus is a topical steroid-free medication with immune-modulating and anti-inflammatory properties, used to treat atopic dermatitis.

Obesity-associated lymphoedematous mucinosis

Obesity-associated lymphoedematous mucinosis (OALM) is a rare and recently identified form of pretibial dermal mucinosis that affects individuals who are...

Nevus sebaceous

A nevus sebaceous (sebaceous naevus) is a common type of birthmark affecting 0.3% of live births.

Aquagenic wrinkling of the palms

Aquagenic wrinkling of the palms is a rare condition characterised by transient oedematous skin of the palms after contact with...

Deucravacitinib

Deucravacitinib is a selective oral tyrosine kinase 2 inhibitor for the systemic treatment of moderate to severe plaque psoriasis and...

Autonomic denervation dermatitis

Autonomic denervation dermatitis is an uncommon localised eczematous eruption around a surgical incision site.

Dihydroxyacetone

Dihydroxyacetone (DHA) is a ketotriose monosaccharide commonly used as the active ingredient in sunless tanning agents (fake tan).

Trichoepithelioma

Trichoepithelioma is a rare benign skin neoplasm that arises from hair follicles.

Baseline series of patch test allergens

Standard or baseline series of allergens are recommended for people undergoing patch testing because these include the most common and...

Neutrophilic sebaceous adenitis

Neutrophilic sebaceous adenitis is a rare inflammatory dermatosis that most commonly affects the face and torso of young men.

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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