Pores are almost everywhere on our body and they are openings that allow substances move between the external environment and our internal skin structures. Congested pores happen when oil, dead skin, and debris get trapped in those openings. It can also occur due to hormonal changes, stress, and medications that increase how much oil your glands produce. Clogged pores can be more common in teenagers and young adults. But it can happen to anyone and anywhere on your body.