L52: Erythema nodosum

Nodules have formed in your skin because the fatty tissue below your skin has become inflamed.

Beneath the skin is fatty tissue. This fatty tissue has become inflamed in your case. As a result, nodules have formed beneath your skin. These nodules are often purplish and may be sore. You may also have painful joints and a high temperature. The lower legs are often affected, and sometimes the arms, too.

The inflamed fatty tissue is usually an indicator of another disorder. The nodules often appear after contact with pathogens or when there is a disorder in the body’s own immune system. Medication can also sometimes trigger an inflammation of the fatty tissue.

The nodules usually clear up after a few weeks, leaving no scars. Once the nodules have healed, the skin in those areas is often brown. The nodules beneath the skin sometimes reappear.

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).