Which of the following is a contraindication for chemical exfoliants on feet?

The presence of sensitive skin is a key contraindication for using chemical exfoliants on the feet. Chemical exfoliants contain active ingredients, such as acids, that increase cell turnover and can be quite potent. When applied to sensitive skin, these agents can cause irritation, redness, and discomfort, potentially leading to more severe skin reactions. Therefore, it's critical to avoid using these products on areas of the body with known sensitivity, as the skin may not tolerate the chemical action efficiently.

In contrast, the presence of dry skin, a history of nail polish allergies, or routine pedicure treatments does not inherently exclude the use of chemical exfoliants. Dry skin might benefit from exfoliation, as it can help to remove dead skin cells and promote hydration. A history of nail polish allergies pertains to reactions caused by products applied to the nails rather than topical exfoliants on the skin. Moreover, routine pedicure treatments typically involve various forms of exfoliation that do not necessarily pose a risk like chemical exfoliants do for sensitive skin. Understanding these distinctions helps in determining safe and appropriate treatment options for clients.