Petroleum jelly is a non-comedogenic cosmetic, which means it doesn't have the potential to cause blackheads or whiteheads and is therefore not bad for skin. Although some skincare professionals worry that it may block pores, there aren't any conclusive studies demonstrating that this is the case.
Petroleum jelly is available in two forms: cosmetic grade and industrial. Although the mineral oil in industrial jelly may cause blackheads or whiteheads, cosmetic grades are not oily enough to do this. As a product that is fragrance-free, it is often used to treat dry skin without causing irritation. Thanks to its paraffin content, petroleum jelly can benefit the skin by offering a protective barrier against cold weather.