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Troubleshooting common serum issues
No visible change after two or three months: confirm that you are using the serum most days, pairing it with daily sunscreen, and giving it at least 8–12 weeks; if there is still no difference, you may need a different active ingredient or a dermatologist’s help with stronger options.
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Troubleshooting your serum in humid weather
You keep swapping serums every week because results are not instant: most actives need several weeks of steady use before you can judge them fairly, and pore appearance often improves slowly. Unless you are clearly reacting, give a new serum at least six to eight weeks along with daily sunscreen before you decide it is not working.