New product → small amount on the inner forearm or behind the ear, once daily for three days. No reaction → side of the jaw for two days → face.
Total cost: five days of patience. What it buys: not discovering a fragrance allergy across your entire face during shaadi season. For actives, “purging vs. reacting” cheat sheet: purging happens where you always break out and settles by week six; reacting happens in new places, itches or burns, and starts fast. Purge \= continue gently. Reaction \= stop.
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The BYOUT Library is educational content, not personalised medical advice. For persistent or severe skin concerns, a dermatologist beats any article, including ours.