Derm - Erythema Multiforme Flashcards
What is erythema multiforme?
Erythematous rash caused by a hypersensitivity reaction
What are the most common causes of erythema multiforme?
Viral infections
Medications
What is erythema multiforme associated with?
Herpes simplex virus
Mycoplasma pneumonia
How does erythema multiforme present?
Widespread, itchy, erythematous rash
Target lesions
Stomatitis
Mild fever
Muscle and joint aches
Headaches
Flu-like symptoms
Symptoms come on abruptly over a few days
How is erythema multiforme managed?
Diagnosed clinically based on rash appearance
Identify underlying cause
When should a CXR be considered in erythema multiforme?
If there was a recent cold sore or treatment with penicillin then you can identify the underlying cause
If no underlying cause CXR to look for mycoplasma pneumonia
How long does it take for erythema multiforme to resolve?
Mild, 1-4 weeks without treatment
Can be recurrent and associated with cold sores
How are severe cases of erythema multiforme managed?
Hospital admission, particularly if the oral mucosa is affected
IV fluids
Analgesia
Systemic or topical steroids
