How long for cog threads (PDO) to start to show results?

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So I’ve done pdo threads a little bit, and I know cog threads basically just make your body produce more collagen in the area you place it over time. I’ve been doing it in my upper eyelid for some extra hooding and generally the night I do it I see some results but by morning it’s gone. I’m wondering if what I’m seeing on the night it temporary swelling or not . And also if anyone has done threads how long did it take for collagen production to create noticeable results. For context over a span of 3 days I’ve placed 6 cogs in my upper eyelids 3 a side