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Generalised rash
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MACULOPAPULAR
VESICULAR
HAEMORRHAGIC ** extravasated blood; do not blanch on pressure. Classified by size
URTICARIAL ** Urticaria (hives), transient, itchy rash raised weals, appears rapidly and fades; it can recur.
Viral exanthems
Petechiae (smallest).
Purpura.
Ecchymoses (largest)
Meningococcal septicaemia
Food allergy, (shellfish, eggs, CMA)
Drug allergy, (* < 10% penicillin allergies are unsubstantiated)
ERYTHEMA MULTIFORME symmetrical rash, annular target (iris) lesions + other lesions (macules, papules, bullae). Mostly idiopathic and self-limiting.
Bleeding disorders- usually present w/ easy bruising, prolonged bleeding following trivial trauma
•(Most common) Infection viral: often self-limiting.
Contact allergy
Causes: infections (HSV, mycoplasma, EBV), drugs.
ERYTHEMA NODOSUMRed, tender, nodular lesions usually occur on the shins.
Causes: streptococcal infection, TB.