On which type of client should clove oil not be used?

Clove oil should not be used on pregnant women due to its potential effects on hormonal balance and uterine contractions. The components of clove oil, particularly eugenol, can stimulate the uterus and may pose a risk of complications during pregnancy. Additionally, clove oil's strong nature can cause adverse reactions in sensitive individuals, such as irritation or allergic responses.

In contrast, while there are considerations for individuals with dry skin or children under 12, clove oil is not specifically contraindicated for them. Clients with normal skin may also use clove oil with proper dilution and guidance from a professional. However, the unique physiological changes and sensitivities experienced during pregnancy make it crucial to avoid the use of clove oil in that population for safety reasons.