Clearly explainedEvidence-based guidance

Possible activity

Koebner phenomenon, friction and injury

The Koebner phenomenon describes new lesions developing where skin has been repeatedly rubbed, pressured or injured. In vitiligo it may indicate activity.

In brief

Key points

  • Possible activity sign
  • Individual relevance
  • Not every injury triggers a patch
  • Document the timing
01

Common situations

Tight seams, equipment, scratching, cuts and burns may precede a patch in some people. Ordinary movement does not need to be avoided.

02

Reasonable prevention

Reduce repeated chafing, fit equipment well and care for injuries normally. Dated photographs help discuss patterns at review.

Editorial basis

Editorial basis: current AWMF S2k guideline on the diagnosis and treatment of vitiligo, register 013-093, version 2.0 dated 27 July 2026. Reviewed on 2 September 2026.

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