

What is a black dot?
Blackheads most often form in the T-zone (front, nose, chin). They appear as a result of an obstruction of the hair canal by keratinocytes (a mixture of sebum and dead cells). Dead cells eventually oxidize in contact with the air and clog the canal, causing comeo or "blackheads" to appear.
Tips for use:
as described, more to test (Translated review)