Rashes Flashcards
Symmetrically distributed
Red, scaly plaque
Well defined edges
Affects elbows, knees and lower back
Chronic Plaque Psoriasis
Small plaques
Teardrop shape
Trunk and limbs
Scaly
Follows strep throat
Guttate Psoriasis
Palms and soles of feet
Red scaly plaques
Well circumscribed
Can also be without redness
Palmo-plantar Psoriasis
Erythematous
Itchy
Crusty
Flexural distribution
Scale
Lichenified (if chronic)
Atopic eczema
Limbs usually, may be widespread
Itchy
1-3cm circular plaques
Exudative and erythematous in acute
Dry in chronic
Discoid eczema
Recurrent
Deep seated blisters/vesicles
Palms and soles
Intense itch/burning
Pompholyx eczema (vesicular hand/foot dermatitis)
Inner ankle/gaiter region
Minimal pain
Shallow, lots of exudate
Background of ankle swelling, varicose veins, haemosiderin staining, dermatitis, lipodermatosclerosis, slow growing thick toenails
Venous leg ulcer
Exaggerated skin markings
Dry scaly surface
Leathery
Broken hairs
Pigmentation
Scratch marks
Lichen simplex
Itchy erosions and/or scales between toes
Scaly erythematous ring with central sparing
Tinea pedis/other
Clusters
Itchy blisters/punched out erosions
Monomorphic
New blisters are umbilicated
Mainly face and neck
Background of dermatitis
Eczema herpeticum
Itch
Large, tense bullae
Maybe non-specific rash before blisters appear
May be local or generalised
Mucosal involvement rare
Bullous pemphigoid
Mucosal involvement
Thin walled, flaccid blisters
Rupture to cause erosions
Pemphigus vulgaris
Symmetrical on scalp, shoulders, buttocks, elbows and knees
Itchy papules or vesicles
Eroded/crusted due to scratching
History of coeliac disease
Dermatitis herpetiformis
Localised, blistering, painful rash
Unilateral
Initially pain without skin change
Crust
Dermatomal distribution
Shingles (Herpes Zoster)
Tender bilateral erythematous subcutaneous nodules
Ill-defined, warm, oval, round or arciform, and without ulceration
3-20cm diameter
Erythema nodosum
Red, expanding patch of skin
Bull’s eye appearance
Mostly asymptomatic
At area of tick bite
Erythema migrans
Rapidly enlarging, very painful ulcer
Full thickness ulcer
Blue undermined borders
Pathergy (areas of local trauma)
Assoc with autoimmune disease
Pyoderma gangrenosum
Severe itch worse at night
Trunk and limbs, spares scalp
Can see burrows
Rash of varied appearance
Scabies
Single plaque appears before rest of rash (herald patch)
Scaly patches/plaques mainly on chest and back
Secondary lesions smaller than herald patch
Sometimes follows URTI
Pityriasis rosea
Widespread sterile pustules
Background of red and tender skin
Generalised pustolosis/pustular psoriasis
