Which skin condition is characterized by papulopustules on an erythematous base around the mouth?

The skin condition characterized by papulopustules on an erythematous base around the mouth is perioral dermatitis. This condition is commonly seen in young women and can present as small red bumps, pustules, and scaling around the mouth and often on the nasolabial folds and sometimes even the eyes. Perioral dermatitis is often associated with the use of topical steroids, certain cosmetics, or fluorinated toothpaste.

The key features that define this condition include the location—primarily around the mouth—and the appearance of the lesions, which are papulopustular rather than vesicular or scaling, making it distinguishable from conditions like atopic dermatitis, which usually presents with more widespread eczema-like lesions, or contact dermatitis, which often shows more of an acute inflammatory reaction related to contact with allergens or irritants. Cystic acne is more characterized by large, painful cysts and nodules rather than the fine papulopustules seen in perioral dermatitis. Understanding these distinctions is crucial for accurate diagnosis and effective management.