L84: Corns and callosities

Your skin has thickened in certain places.

If the skin comes under pressure for a long time, the body forms thicker skin in those places. This thickened skin is called callused skin. Callused skin is tougher than normal skin and is supposed to protect the relevant places from further pressure. Skin usually becomes callused in places where you can easily feel the bones beneath the skin. Hands and feet are often affected.

If further pressure is put on the callused skin, the tough, callused skin can become irritated. The places affected may become inflamed and be sore.

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).