Please recommend a pore-minimizing ampoule or essence.

My pores are getting bigger, and on top of that, I have blackheads—it's a total disaster. For those of you who originally had large pores but saw results with pore-shrinking products, please recommend some pore-shrinking ampoules or essences. I'm looking for gentle, hypoallergenic products.

My pores were large, and it seems that irritating products have a negative effect on shrinking them.