Which skin condition indicates an excess of keratin in the skin?

The skin condition that indicates an excess of keratin in the skin is keratosis. This term refers to a variety of skin growths that result from an overproduction of keratin, which is a type of protein that helps form the structure of the skin, hair, and nails. When keratin builds up excessively, it can lead to rough, scaly patches on the skin or thickened areas known as keratoses. Various forms of keratosis include seborrheic keratosis and actinic keratosis, both of which are characterized by the accumulation of keratin.

In contrast, acne primarily results from clogged pores due to oil, dead skin cells, and bacteria, rather than an excess of keratin itself. Eczema is a condition that typically involves inflammation and is related to allergic reactions or sensitivities, and it does not specifically result from an overproduction of keratin. Psoriasis is an autoimmune condition that causes the rapid growth of skin cells, leading to thick patches, but it is more related to an increase in cell turnover rather than specifically excess keratin. Each of these conditions has different underlying mechanisms, making keratosis the clear indicator of excess keratin production.