Hyperkeratosis can occur as an isolated disorder, or as a symptom/partial symptome of skin diseases, respectively genetic disorders.
Reactive or exogenic hyperkeratosis develops from eg.
A callous is a hyperkeratosis developing from mechanical stress of the skin. Verruca vulgaris is an example for a hyperkeratosis related to a skin infection.
The endogenic skin disorders with hyperkeratosis include amongst others:
