Detailed answer

Blackheads result from the buildup of dead skin cells, excess oil, and bacteria in the pores. This process takes time, and blackheads usually form gradually over a period of several days or weeks. It starts with the clogging of the pore, and as the pore becomes blocked and the oil and dead skin cells accumulate, the blackhead eventually becomes visible on the surface of the skin. However, it is important to note that individual skin types and conditions may vary, and the timeline for blackhead formation can differ from person to person.