How does your skin purge when new products are introduced
[ Edited ]
So I'm just slowly starting to use retinol things (retinyl palmitate mostly, baby steps), but I'm getting a lot of whiteheads on my chin. Granted, that's where I get oily and have some bumps, which could be under the skin whiteheads that the new products are bringing out, and it's only been 4 days....unless the products are the cause of the whiteheads. And it's only under the chin, nothing else.
So, I was wondering whether anyone went througha purging phase with a product? where and for how long?