Final answer:
For a microdermabrasion test, choose less conspicuous skin areas like the inside of the wrist or under the jawline to gauge skin sensitivity before treating more visible areas.
Step-by-step explanation:
When performing a microdermabrasion test, it is crucial to select a safe and less visible skin area, as this is a skin resurfacing procedure that involves exfoliating the outermost layer of skin. It is generally recommended to test the procedure on less conspicuous areas first to see how your skin reacts before proceeding to more visible regions. Suitable test areas might include the inside of the wrist or under the jawline, as these parts tend to be more covered and can give a good indication of skin sensitivity without being overly exposed. The outside of the ankle could be considered as well, but as it may not mimic the facial skin accurately in terms of sensitivity and skin thickness, results might vary. The side of the cheek is often treated during microdermabrasion, but for testing purposes, it might be more visible if the skin reacts negatively. Therefore, commence testing on the inner wrist or under the jawline for a safer approach to gauge skin response.