On what type of skin should a clay mask not be applied?

The choice related to oily skin is accurate because clay masks are specifically designed to absorb excess oil and impurities from the skin. However, while they work effectively on oily skin, the primary concern here is that clay masks can be too drying for other skin types, especially when left on for extended periods or used too frequently.

On dry skin, for example, a clay mask can exacerbate dryness and lead to irritation or flakiness. It is essential for individuals with dry skin to use moisturizing masks instead that provide hydration rather than extraction. Combination skin might tolerate a clay mask selectively on the oily parts of the face but should be approached with caution. Normal skin might not have negative reactions but can still benefit more from nurturing products that support its balanced characteristics rather than a mask that absorbs oils.

Thus, while clay masks are advantageous for oily skin, they are generally not recommended for dry skin, where they could further strip moisture.