1d • Paramedic Talk
The word "Erythema"
Causes of "Erythematous skin"
Erythema = vasodilation/inflammation. On exams, they love pattern recognition:
- Infectious: cellulitis, scarlet fever, meningococcemia (may start as erythema), & viruses
- Allergic/immune: urticaria, anaphylaxis, contact dermatitis, drug eruptions
- Heat/vasodilatory: heat illness, fever/flushing, sunburn
- Toxicologic: CO exposure (classically “cherry red” is unreliable), niacin flush, anticholinergic vs sympathomimetic syndromes (often flushed)
- Shock/inflammatory states: early sepsis (warm, flushed)
- Autoimmune: lupus rash, dermatomyositis, vasculitis
Pearl: Erythema + hypotension/wheeze/angioedema = anaphylaxis until proven otherwise.
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The word "Erythema"
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