Herpes simplex (cold or fever sore; genital herpes)

DDx

  • Impetigo
  • Varicella (chicken pox)
  • Herpes zoster (shingles)
  • Scabies
  • Trauma
  • Genital lesions: syphilis, chancroid, lymphogranuloma venereum, granuloma inguinale, Behçet’s syndrome
  • Oral lesions: aphthous ulcers, herpangina (coxsackievirus), erythema multiforme, pemphigus, primary HIV infection, candidiasis, reactive arthritis, systemic lupus erythematosus, Behçet’s syndrome, bullous pemphigoid, squamous cell carcinoma

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