Pores are perfectly normal; all they are is tiny openings in the skin that your hairs stem from, with sebaceous glands under them that produce oil.   Throughout the day, dead skin cells, oil, dirt, makeup, pollution and more build up on your face and therefore sink into your pores. This can cause blockages and blackheads. That being said, clogged pores, as with any other skin concern, can often be genetic or hormonal. The amount of dead skin and sebum produced is down to your genes, so this could be the culprit if there’s an excess amount that’s blocking up your pores