L56.3: Solar urticaria

Parts of your skin are red and swollen immediately after your skin has been exposed to light.

This condition causes wheals to form on the skin immediately after light exposure. The skin is swollen around the wheal. Wheals are therefore slightly higher than the surrounding skin. They may appear light or reddish. The skin is red around the wheals. The affected areas of the skin can be very itchy. The skin lesions disappear within minutes or hours by themselves.

If large areas of the skin are affected, other symptoms such as headache or tiredness can occur. The person may also be light-headed or lose consciousness.

Additional indicator

On medical documents, the ICD code is often appended by letters that indicate the diagnostic certainty or the affected side of the body.

  • G: Confirmed diagnosis
  • V: Tentative diagnosis
  • Z: Condition after
  • A: Excluded diagnosis
  • L: Left
  • R: Right
  • B: Both sides

Further information


This information is not intended for self-diagnosis and does not replace professional medical advice from a doctor. If you find an ICD code on a personal medical document, please also note the additional indicator used for diagnostic confidence.
Your doctor will assist you with any health-related questions and explain the ICD diagnosis code to you in a direct consultation if necessary.


Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).