Pimples/skin care questions! 🆘

Only answer the questions you have a factual answer to 💙 I know not all my questions may be able to be answered

1. Is it normal for pimples to show up few days or weeks after using a product that cleans out pores or acne product? Like is the product lifting everything to the surface, is it a good thing?

2. What product is best to use to get rid of post-pimple bumps/marks/scars?

3. Has anyone tried one of those blackhead/pore vacuum things and any tips you can give me about it? Can I use it on existing pimples?