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Pityriasis rosea

Pityriasis rosea (Gibert) · Pityriasis rosea (růžová lupenovitost)

What it is

A self-limiting rash that starts with one 'herald patch' and then spreads as oval patches along the ribs in a Christmas-tree pattern; linked to herpesviruses 6 and 7.

Symptoms & signs

  • One larger scaly pink patch first
  • a week later many smaller oval patches on the trunk
  • mild itch
  • may feel unwell beforehand
  • clears in 6–10 weeks

🚩 Get help if…

  • see a doctor soon Rash in pregnancy
  • see a doctor soon Rash on the palms or soles — test for syphilis
  • see a doctor soon Rash lasting over 3 months
  • see a doctor soon Blisters, fever or feeling very ill

Where it strikes

Medical treatment

  • Reassurance — it goes by itself
  • emollients and antihistamines for itch
  • mild steroid cream
  • test for syphilis if atypical

Natural & lifestyle

  • Lukewarm showers and gentle soap
  • loose cotton clothing
  • moderate sunlight

Emerging & experimental

  • Aciclovir to shorten it (small trials)
  • narrowband UVB

Alternative, off-label & anecdotal

Approaches used outside the guidelines, with what their supporters report and what testing has found so far.

  • Sunlight or UV — small trials shorten itch early / small studies
  • Oatmeal baths — soothing; untested anecdotal / traditional
  • Aciclovir early — small trials, may speed clearing early / small studies

ICD codes