Final answer:
Inverse psoriasis is a form of psoriasis presenting as smooth, red lesions typically located in skin folds. It results from abnormal cytokine production leading to rapid skin cell turnover, causing inflammation and buildup of skin cells.
Step-by-step explanation:
Inverse psoriasis, also known as intertriginous psoriasis, is a subtype of psoriasis characterized by lesions in the body's skin folds, such as behind the knees, under the arms, or in the groin area. Unlike the more common plaque psoriasis, inverse psoriasis is particularly seen in the form of smooth, shiny, and red patches. It can be aggravated by friction and sweating due to its location in skin folds. The rapid cell turnover that is indicative of psoriasis happens due to the abnormal production of cytokines by keratinocytes, dendritic cells, and T cells, leading to inflammation and the subsequent buildup of skin cells. While this process normally takes about a month, in psoriasis, it can occur in just a few days, causing the thick, inflamed patches of skin characteristic of the condition.