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Test your knowledge. Patient with a skin rash.

Eugene Tan1, Fernanda Teixeira

  • 1Dunedin School of Medicine, New Zealand.

Australian Family Physician
|May 30, 2003
PubMed
Summary

A tourist developed a severe, itchy rash after sun exposure in Australia, unresponsive to antihistamines. This case highlights a potential reaction to sunscreen combined with intense UV radiation.

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Area of Science:

  • Dermatology
  • Photobiology
  • Toxicology

Background:

  • A healthy 22-year-old male with no prior skin conditions visited Queensland, Australia.
  • He used a new SPF130 sunscreen purchased in Japan.
  • He was advised about the strong Australian sun exposure.

Observation:

  • The patient developed erythematous papules and vesicles on sun-exposed areas (forearm, neck) on day 3.
  • Lesions evolved into pruritic, erythematous plaques by day 4.
  • Facial skin remained unaffected.

Findings:

  • The patient's symptoms were resistant to loratadine treatment over seven days.
  • The clinical presentation suggests a possible photo-dermatitis or allergic reaction.

Implications:

  • This case may indicate a potential adverse reaction to a specific sunscreen formulation under intense UV conditions.
  • Further investigation into sunscreen ingredients and phototoxicity is warranted.
  • Clinicians should consider sunscreen-induced photodermatitis in differential diagnoses for unexplained rashes in sun-exposed individuals.

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