Which treatment should cease upon the first signs of redness?

The appropriate treatment to stop at the first signs of redness is microdermabrasion. This procedure involves the mechanical exfoliation of the skin using fine crystals or a diamond-tipped wand, which can sometimes cause irritation. Redness is an indicator that the skin may be responding negatively to the treatment, suggesting that it is being over-stimulated or sensitized.

Ceasing the treatment upon the first signs of redness is crucial to avoid further irritation, potential damage, or an adverse reaction. Monitoring the skin's response during any aesthetic procedure is vital, but microdermabrasion, due to its abrasive nature, particularly warrants immediate reassessment if discomfort or redness arises.

In contrast, other treatments mentioned might have different protocols. For example, while chemical peels and laser treatments can also elicit redness, they often have specific guidelines on how to manage such symptoms, including possibly continuing with gentle care or adjustment rather than immediate cessation. Waxing typically leads to redness but is usually followed by post-care protocols rather than immediate termination of the procedure itself. Thus, the appropriate action of stopping microdermabrasion at the first indication of redness emphasizes the importance of skin sensitivity and care during cosmetic procedures.