N Skin topics

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.

 

  • Naevus fusco-caeruleus zygomaticus

    Naevus fusco-caeruleus zygomaticus also known as hori’s naevus, presents as benign (harmless) blue-grey to gray-brown patchy and spotty pigmentation on the prominence of the cheeks.

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  • Naevus of Ota (NOO) and Ito (NOI)

    Naevus of Ota is a pigmented birthmark that is slate-brown or blue/grey in colour. When examined under a microscope, the pigmented naevus cells are found in the deep layer of the skin (dermis).

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  • Naevus sebaceous

    Naevus sebaceous is a birthmark usually seen on the scalp or face of newborns and infants. In rare cases it can be present on other areas of the body. Naevus sebaceous can be thought of as being simil...

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  • Naevus spilus

    Naevus spilus is a type of birthmark that consists of a flat brown background patch containing darker brown spots or tiny bumps.

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  • Nails

    Nails are specialised protective plates of hard keratin (protein that helps form the nail plate) that develop from the epidermis (outermost layer of the skin) overlying the small bones at the ends of ...

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  • Nappy rash

    Nappy rash is a common, irritant dermatitis occurring in the nappy area, mostly in children under the age of two years. It is not primarily an infection or the result of poor hygiene. There are now fe...

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  • Neonatal acne

    Neonatal acne affects babies in the first 3 months of life. About 20% of healthy newborn babies may develop superficial pustules mostly on the face but also on the neck and upper trunk

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  • Neonatal and infantile acne

    Neonatal acne affects babies in the first 3 months of life. About 20% of healthy newborn babies may develop superficial pustules mostly on the face but also on the neck and upper trunk.

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  • Neonatal cephalic pustulosis

    Neonatal cephalic pustulosis also known as neonatal acne affects babies in the first 3 months of life. About 20% of healthy newborn babies may develop superficial pustules mostly on the face but also ...

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  • Neonatal lupus erythematosus

    Neonatal lupus is an autoimmune disease. It occurs when an antibody is transferred from the mother to the baby. The antibody can affect the baby’s skin, heart, liver, blood and brain. Neonatal lupus...

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  • Neurodermatitis

    Neurodermatitis also known as Lichen simplex chronicus, is characterised by thickening of the skin due to chronic rubbing or scratching. Exaggerated skin markings termed “lichenification” are com...

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  • Neurotoxins

    Neurotoxins are a group of substances that are used in dermatology to treat hyperhidrosis (excessive sweating). They are also used to reduce wrinkles, most commonly those around the eyes and on the fo...

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  • Nevus araneus

    Nevus araneus also known as a Spider naevus is a common harmless vascular lesion seen in up to 10% of the population. They usually appear as single or multiple spots on the face, chest and neck areas...

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  • Nevus flammeus

    Nevus flammeus also known as a port-wine stain, is a pink to red flat patch on the skin which has well-defined edges.  It is a true birthmark present in 3 to 5 per 1000 newborn babies. It is permane...

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  • Norwegian scabies

    Norwegian scabies is a more severe form of scabies. Scabies is a condition that occurs as a result of infestation with a tiny mite (parasite) called Sarcoptes scabei var hominis.

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  • Notalgia paraesthetica

    Notalgia paraesthetica is a disorder where an often intense localised itch occurs without a rash on the mid to upper back between the shoulder blades. It is thought to be due to sensory nerve irritati...

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  • Nuchal Keloid Acne

    Nuchal Keloid Acne also known as Acne keloidalis nuchae (AKN) is a chronic inflammatory condition that affects hair follicles on the back of the neck. AKN is most commonly seen in men of African-Carib...

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