Large pores can be caused by hormones, UV damage, acne, as well as hereditarily. One major cause of large pores is accelerated UV damage. UV damage causes a loss in collagen, reducing the skin’s natural ability to support itself. This can cause pores to look sunken and large. Acne scarring or other skin injuries can also cause depression-type pores as well. Other damaging actions to the skin such as squeezing blackheads and pulling on the skin can also damage the pores. Without proper treatment and care, the collagen loss can exacerbate the look of large pores, causing them to age, deform and more obvious. It is important to consider proper treatment can help reduce the appearance of pores and smoothen the skin.