A – Z of Skin

Information for Skin, Hair and Nail Conditions


The A to Z of Skin information has been developed to help you understand more about common skin conditions and problems, and how these may be treated.

Both common and medical names have been included to help your search, as well as the names of medications and treatments. There are also a number of cosmetic topics which explain the latest treatments for cosmetic concerns related to the skin. Many College dermatologists have contributed to the information on this site.

The process has been overseen by a committee of dermatologists to ensure that the final versions are both accurate and user friendly. Particular thanks go to Dr Pam Brown, Dr Peter Berger, Dr Davin Lim, Dr Michelle Rodrigues, Dr Yin Vun, Conjoint Associate Prof Orli Wargon and Dr Eleni Yiasemides (Chair). The A to Z information is currently under development. Please check back on a regular basis for updates and the addition of new topics.

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  • Ecthyma contagiosum

    Eecthyma contagiosum also known as Orf is an infection caused by the parapox virus which primarily infects sheep and goats. The condition is most commonly seen in animal handlers, butchers and farm workers. Anyone can become infected by touching the affected animals or by contact with infected pastures. Orf occurs worldwide.

  • Eczema in pregnancy

    Eczema in pregnancy is also known as atopic eruption of pregnancy. This is the most common of the pregnancy dermatoses (incidence 1:300-3000).

  • Enteroviral vesicular stomatitis

    Enteroviral vesicular stomatitis also known as hand, foot and mouth disease is a common contagious viral illness that spreads from person to person.

  • Epidermal naevus

    It is a term for a group of birthmarks made from cells from the outer portion of the skin (the epidermis), which appear in one or many lines or in a swirled pattern.

  • Epidermoid cyst

    An epidermoid cyst is a benign walled-off cavity filled with keratin which originates from the hair follicle unit.

  • Epidermolysis bullosa

    Epidermolysis bullosa (EB) is a group of rare inherited skin fragility disorders which are characterised by blistering of the skin with minor injury.

  • Epidermolysis bullosa acquisita

    EBA is a rare blistering disease which produces deep, tense blisters on the skin and mucosal surfaces (mouth, genitals, nose and eyes) which typically heal with scarring. EBA can occur at any age but more frequently affects elderly persons.

  • Epidermolysis bullosa simplex

    Epidermolysis bullosa simplex (EBS) is one of the main types of epidermolysis bullosa (EB). This group of inherited skin fragility disorders is characterised by blistering of the skin with minimal injury.

  • Erosive Pustular Dermatosis of the Scalp (EPDS)

    EPDS is a rare inflammatory condition of the scalp most commonly seen in elderly males.

  • Erosive pustulosis

    EPDS is a rare inflammatory condition of the scalp most commonly seen in elderly males

  • Erythema ab igne

    Erythema ab igne (EAI) is a skin reaction characterised by a pattern of erythema (redness) resembling a net or hyperpigmentation (increased pigmentation) caused by chronic exposure to heat.

  • Erythema annulare centrifugum

    Erythema annulare centrifugum (EAC) refers to an annular (ring-shaped) erythematous (red) skin eruption that tends to spread outwards whilst clearing centrally.

  • Erythema dyschromicum perstans and lichen planus pigmentosus

    Erythema dyschromicum perstans and lichen planus pigmentosus

  • Erythema infectiosum

    Erythema infectiosum is usually a harmless childhood viral infection characterised by a classic slapped-cheek appearance or a lacy patterned rash. The infection can be associated with fevers.  

  • Erythema multiforme

    Erythema multiforme (EM) is an acute skin condition that may be recurrent in some cases. It occurs most commonly in association with the herpes simplex virus as an immune response to the infection. Young males are most commonly affected.

  • Erythema nodosum

    Erythema nodosum is the most common type of panniculitis (inflammation of the fat layer in the skin) leading to red, raised nodules usually over the shins, ankles and knees. Erythema nodosum can occur at any age but most commonly occurs between 20 to 40 years of age. It occurs more commonly in women than men.

  • Erythrasma

    Erythrasma is a very common skin condition that affects the groin, under the arms and in between the toes.

  • Erythromelalgia

    Erythromelalgia is a rare skin condition mainly seen in people aged over 60. The patient experiences episodes of burning redness and heat most commonly in the feet, but in can occur in the hands

  • Excessive hair growth

    Excessive hair growth also known as hirsutism, refers to excessive hair production in both males and females. However, medically it is used to define increased hair growth in women. Hirsuitism affects 5-10% of women.

  • Extramammary paget disease

    Extramammary paget disease (EMPD) is a rare type of skin cancer, characterised by a chronic scaly rash of the anogenital areas. EMPD favours elderly women older than age 50 years