Lichen simplex chronicushttps://en.wikipedia.org/wiki/Lichen_simplex_chronicus
Lichen simplex chronicus is a thick, leathery‑like skin condition with exaggerated skin markings caused by persistent itching and excessive rubbing or scratching. It typically presents as small papules, patches, scratch marks, and scaling. The most common sites are the sides of the neck, scalp, ankles, vulva, pubis, scrotum, and the extensor surfaces of the forearms. Chronic excoriation can cause the skin to become thickened and hyperpigmented (lichenified).

This chronic pruritic condition develops gradually, and scratching often becomes a habit. People with lichen simplex chronicus report intense pruritus followed by uncontrollable scratching of the same area.

○ Treatment ― OTC Drugs
Washing the affected area with soap does not help and may worsen the condition.

Low‑potency OTC steroid ointments may be ineffective; they often need to be applied for one week or longer to see improvement.
#Hydrocortisone ointment

OTC antihistamine. Cetirizine or levocetirizine are more effective than fexofenadine but make you drowsy.
#Cetirizine [Zytec]
#LevoCetirizine [Xyzal]
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  • Lichen simplex chronicus is a common disease. If you have thick plaque lesions that itch for a long time on your legs, this disorder can be considered.
  • If eczema persists for a long time, the skin may thicken and become pigmented.
References Lichen Simplex Chronicus Itch: An Update 36250769 
NIH
LSC is a localized skin disorder clinically characterized by lichenified plaques of skin often accompanied by overlying excoriations. These plaques can become discoloured, with varying shades of erythema ranging from pink to dark brown. Over a longer course, it may transform into a hypopigmented plaque with a darker border. They are localized to specific areas of the body as one or a few plaques. This is in contrast to prurigo nodularis (PN), another chronic pruritic condition, which is frequently more broadly distributed across multiple regions of the body as nodules. While LSC may sometimes be referred to as a neurodermatitis, which encompasses other chronic itchy conditions.
 Lichen Simplex Chronicus 29763167 
NIH
Lichen simplex chronicus is defined as a common form of chronic neurodermatitis that presents as dry, patchy areas of skin that are scaly and thick. The hypertrophic epidermis generally seen is typically the result of habitual scratching or rubbing of a specific area of the skin.