What condition is characterized by chronic inflammation of the sebaceous glands?

The condition characterized by chronic inflammation of the sebaceous glands is acne. This skin disorder primarily affects the hair follicles and sebaceous glands, leading to the formation of lesions such as pimples, blackheads, and cysts.

The inflammation associated with acne results from various factors, including excess sebum production, the presence of bacteria such as Propionibacterium acnes, and the clogging of hair follicles with dead skin cells. This condition typically manifests during adolescence due to hormonal changes but can persist into adulthood, affecting individuals of all ages.

Other skin conditions listed, such as eczema, psoriasis, and rosacea, involve inflammation but are driven by different underlying mechanisms and do not specifically target the sebaceous glands as the primary site of inflammation. For instance, eczema is more associated with allergic reactions and environmental factors, while psoriasis is linked to an overactive immune response. Rosacea involves facial redness, flushing, and sometimes papules, but it is not primarily driven by sebaceous gland inflammation as seen in acne.