|Symptoms||Thick skin, exaggerated skin markings|
|Causes||Excessive rubbing, scratching|
Lichenification is thick hard skin with prominent skin markings, typically from repeated scratching or rubbing. Sites of the body prone to rubbing such as the neck, wrists, hands, forearms, waist, genital area, legs and tops of feet, are particularly susceptible. Its presence is usually a clue to another problem.
It may occur in lichen simplex chronicus, or be due to other conditions which include eczema, psoriasis, excessive dry skin, pityriasis rubra pilaris, anxiety, and obsessive-compulsive disorders. If generalised, it may be a sign a more serious condition such T-cell lymphoma and Sézary syndrome. It may require tests to find out why the excessive itch.
- Morris-Jones, Rachael (2019). "1. Introduction". In Morris-Jones, Rachael (ed.). ABC of Dermatology (7th ed.). Hoboken: Wiley Blackwell. pp. 4–6. ISBN 978-1-119-48899-6. Archived from the original on 2023-07-06. Retrieved 2023-07-05.
- Aboobacker, Shamma; Harris, Blair W.; Limaiem, Faten (2022). "Lichenification". StatPearls. StatPearls Publishing. PMID 30726017. Archived from the original on 2021-03-10. Retrieved 2022-05-16.