Which treatment should not be performed on someone with an iodine allergy?

The choice of an algae body wrap as a treatment to avoid for someone with an iodine allergy is due to the potential presence of iodine in marine algae. Algae, much like seaweed, are sourced from oceanic environments and may contain varying levels of iodine. For individuals with an iodine allergy, exposure to anything that could trigger an allergic reaction is crucial to avoid, which makes an algae body wrap risky.

In contrast, treatments like a clay mask or herbal facial generally do not involve iodine or its derivatives, making them safer options for someone with this specific allergy. While seaweed, which is closely related to algae, can also contain iodine, the specific context of the question indicates that the algae body wrap is the most direct concern due to its materials.