Urticaria solaris

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Classification according to ICD-10
L56.3 Urticaria solaris
ICD-10 online (WHO version 2019)

When urticaria solaris is an acute skin reaction to (sun) light. The skin typically reacts with wheals, reddening and itching. Terms used synonymously are urticaria photogenica , solar urticaria , summer urticaria , photoallergic urticaria and solar urticaria .

root cause

Typical of solar urticaria is the short-term (a few minutes) appearance of wheals after exposure to sunlight. The trigger can be visible sunlight as well as UV-A and UV-B radiation.

Symptoms

Itching, reddening and wheals (hives) occur in sun-exposed areas of the skin . Inflammatory substances in the mast cells (including histamine ) are responsible for this reaction .

Diagnosis

If light urticaria is suspected, a light skin test is carried out. Small areas on the body are exposed to light of different wavelengths, which both fundamentally confirms the diagnosis and at the same time differentiates the individual forms (sensitivity to light of a certain wavelength).

therapy

Therapeutically, avoiding strong sunlight and using sun protection creams (high sun protection factor required) are recommended. In individual cases, controlled irradiation with light in the appropriate wavelength and in increasing amounts can ensure that those affected can expose themselves to sunlight for longer (increased tolerance). In the short term, the use of corticoids may be necessary symptomatically .

Individual evidence

  1. ↑ P. Reuter: Springer Large Dictionary Medicine - Medical Dictionary German-English / English-German. Verlag Springer, 2005, ISBN 3-540-21352-X , p. 952, (online)
  2. ↑ a b U. Wahn: Pediatric Allergology and Immunology. Urban & Fischer-Verlag, 2005, ISBN 3-437-21311-3 , p. 407, (online)
  3. ↑ J. Dahmer: Anamnesis and findings: the symptom-oriented patient examination as the basis of clinical diagnosis. Georg Thieme Verlag, 2006, ISBN 3-13-455810-6 , p. 141, (online)
  4. ↑ U. Wahn: Pediatric Allergology and Immunology. Urban & Fischer-Verlag, 2005, ISBN 3-437-21311-3 , p. 409, (online)