Erythema multiforme

• History / PE:
  Target lesions (palm/sole involvement)
  
• Diagnosis:
  H/O recurrent multiple labial herpes (in cases of multiple recurrences)
• Complications:
  Toxic Epidermal Necrolysis
  Stevens Johnson Syndrome
• Associated With:
  Recurrent HSV infection of lip
  Drugs (eg. anticonvulsants, barbituates, penicillin, NSAIDs )
  Mycoplasma infections