Lichenification is best described as?

Lichenification is best described as a thickening of the skin due to scratching or prolonged friction. This process occurs as a response to chronic irritation, where the skin undergoes a change in its texture, becoming leathery and often resulting in an accentuation of normal skin markings. It commonly appears in areas where the skin has been repeatedly scratched or rubbed, leading to an increase in the epidermal layer's thickness.

In clinical practice, recognizing lichenification is important as it indicates an underlying chronic inflammatory condition or dermatitis, such as atopic dermatitis or eczema, that has led to the skin changes. The distinction between lichenification and other skin lesions, such as those caused by infections or acute inflammatory conditions, is key for accurate diagnosis and treatment planning.