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Urticaria (Hives, nettles rash or weals) - Coggle Diagram
Urticaria (Hives, nettles rash or weals)
Causes
Acute (<6 weeks)
Food reaction
Insect bites/stings
Contact allergens (latex)
Drugs (penicillin, Vaccines)
Chronic (>6 weeks)
Chronic spontaneous Urticaria (CSU)
No known cause but heat stress drugs and infection aggrivate
Auto immune urticaria (AU)
30-50% of chronic urticaria cases
Presence if IgG Antibodies
Chronic Ineducable urticaria
Aquagenic (hot/cold water)
Cholinergic
Heat/Cold urticaria
Symptomatic dermatographism
Delayed pressure urticaria
Solar
Vibratory
Contact
Management
Trigger avoidance
Symptom diary
Non-sedating antihistamine for 6/52
Oral corticosteroids for 7 days + antihistamine
if symptoms severe
Prescribe a topical antipruritic treatment (menthol 1% in aqueous cream to relieve itch)
Dermatology or immunologist referral
Painful or persistent
Foor or latex allergy suspected
Solar or cold urticaria
Clinical psychologist if significant social or psychological problems.
Diagnosis
History- SOCRATES
Treatment trialed and response
Family history
PMH including allergies
Differentials
Atopic Eczema
Contact dermatitis
Contact Pruritis
Erythema multiforme minor
Insect bite or sting
Pemphigoid (bullous) and dermatitis herpetiformis
Polymorphic eruption of pregnancy
Urticaria pigmentosa
Urticarial vasculitis