Rash/Derm Guide
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August 26, 2020
Rash – Apearance
- Hypopigmentation (white or lighter coloured areas of skin)
- Hyperpigmentation (darker coloured areas of skin)
- Shape of lesion or rash
- Scaly / rough / peeling / crusty
- Patches / plaques (patch = larger flat area of skin change / plaque = an elevated patch)
- Macules / papules (macule = small flat lesion / papule = small raised lesion)
- Nodules (a larger raised lesion)
- Pustules (small pus-filled lesions) and boils
- Vesicles / blisters (bullae)
- Ulceration / necrosis
- Vascular
- Structural changes (firm or weak patches, or altered elasticity)
Rash – Site
- Erythroderma (a rash that covers 90% or more of the skin surface)
- Scalp and hair (hair loss or excess hair)
- Face and neck
- Eyelids
- Nose
- Mouth
- Lips
- Ears
- Neck / upper chest
- Trunk (chest, abdomen and back)
- Flexures (body folds eg armpits, groins and under breasts)
- Limbs – arms and legs
- Hands
- Feet
- Nails
- Genital
Lesions
Brown/Black/Blue
Red/Pink/Purple/Skin Colour
- Flat, and smooth to touch
- Scaly / crusty (usually rough to touch)
- Raised, and soft or wobbly to touch – either sessile (broad-based) or pedunculated (on a stalk)
- Raised, smooth and firm to touch, skin-coloured
- Raised, smooth and firm to touch, pink-red or purple
- Subcutaneous / deep seated (much of the lesion sits under the skin surface)
White
Yellow
Orange
Skin Conditions (DermnetNZ – a bit clunckier)
- Dermatopathology index
- Acne and other follicular disorders
- Blistering skin conditions
- Deep skin disorders
- Differential diagnosis of itchy skin
- Disorders of sweating and sweat
- Eczema, dermatitis and allergies
- Erosions and ulcers
- Immunological disorders
- Lesions, tumours and cancers
- Pigmentation problems
- Pustular skin conditions
- Reactions to external agents
- Scaly skin conditions
- Skin of colour
- Skin signs and systemic disease
- The mind and the skin
- Tropical skin diseases
- Vascular skin problems