What is a potential risk of using steam on the face during a facial?

Using steam on the face during a facial can indeed aggravate certain skin conditions like rosacea, making this the correct choice. Steam therapy increases blood circulation and dilates blood vessels, which can exacerbate redness and inflammation commonly associated with rosacea and other similar conditions. For individuals with sensitive or reactive skin, the heat and humidity from steam can lead to irritation, making it essential for estheticians to assess the client's skin type and condition before applying steam.

In contrast, over-exfoliation and excessive dryness are more related to the application of products and techniques rather than the steam itself. While steam can be a complementary part of a facial treatment, it should not be applied indiscriminately, especially in cases of pre-existing skin issues. Furthermore, while steam might assist in loosening dirt and debris from the pores, it does not guarantee pore clearance in every situation, and thus the notion that it always helps is misleading.