Most of the time blackheads are a result of oil and grime that settles in the pores of the skin. This is the most common answer to what causes blackheads. As the air oxidizes this accumulation, it gives a dark colour to it in the process.
Most of the time blackheads are a result of oil and grime that settles in the pores of the skin. This is the most common answer to what causes blackheads. As the air oxidizes this accumulation, it gives a dark colour to it in the process.