Polymorphic Light Eruption (PMLE)

What is PMLE?

Polymorphic light eruption (PMLE) is a common sun-induced skin rash that occurs in susceptible individuals when their skin is exposed to ultraviolet (UV) radiation, typically from sunlight.

Key Characteristics

• Appears within hours to days after sun exposure
• Most common in spring and early summer
• Affects primarily sun-exposed areas
• More frequent in women than men
• Usually improves as summer progresses

Common Symptoms

• Rash appearance:
  • Small red bumps
  • Itchy patches
  • Blisters
  • Dense clusters of bumps
• Location: Typically affects
  • Arms
  • Chest
  • Neck
  • Legs

Diagnosis

• Clinical examination
• Detailed patient history
• Sometimes photoprovocation testing
• Rarely, skin biopsy

Treatment Options

Immediate Relief

• Topical corticosteroids
• Antihistamines
• Cool compresses

Prevention

1. Sun Protection:

   • Broad-spectrum sunscreen (SPF 30+)
   • Protective clothing
   • Avoiding peak UV hours

2. Phototherapy:

   • Controlled UV exposure
   • Gradual skin hardening

When to Seek Medical Help

• Severe reactions
• Symptoms lasting more than 2 weeks
• Signs of infection
• Significant impact on quality of life

Long-term Management

• Gradual sun exposure in spring
• Regular sun protection
• Possible preventive medications
• Vitamin D supplementation if needed