Hi,
In general facial scrubs tend to irritate the skin rather than improve the condition of the skin. It is actually a fallacy that there are impurities on the skin surface that requires a scrub to remove to achieve a clearer and better complexion including pore size reduction.
The top layer of the skin, the stratum corneum, actually has an important role in barrier function; preventing damaging irritants and harmful allergens from reaching the lower skin layers. Hence, damaging this layer using a facial scrub causes more skin irritation in the long-term with no significant benefits to the pore size.
For prominent pores, the better options for improvement include: topical retinoids, Rejuran Healer, and energy-based skin resurfacing procedures such as microneedle RF and fractional lasers.
Hope this helps!