Open pores, often visible as small dots on the nose, cheeks, or forehead, occur when hair follicles or oil glands become enlarged. Genetics, oily skin, sun damage, and ageing are common culprits.

Blackheads, also known as open comedones ... hence their name. These clogged pores are commonly found on the nose, forehead, chin, back and chest since they are sebum rich areas, says board ...