Which conditions should be included in the differential diagnosis of pediculosis (lice infestation)?

Updated: Aug 16, 2019
  • Author: Lyn C C Guenther, MD, FRCPC, FAAD; Chief Editor: Michael Stuart Bronze, MD  more...
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Answer

Other problems to be considered in the differential diagnoses of head louse infestation include the following:

  • Dandruff
  • Fibers
  • Scabs
  • Desquamated cells
  • Dirt
  • Dried hairspray/gel
  • Dermatophyte infection
  • Piedra (black piedra from Piedraia hortae, white piedra from Trichosporon asahii and other species of Trichosporon)
  • Hair shaft abnormalities (ie, monilethrix, trichorrhexis nodosa)
  • Delusions

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