Zits that appear as white bumps are called whiteheads or closed
comedones. This is due to the accumulation of excessive oil in the
follicule, narrowing and plugging the pores. And also the clumping
of keratin or dead skin cells and oil, adding to the plugging. The
oil -sebum- ferries dead skin cells along the follicule and through
the opening, however the exit of oil and dead skin cells, is
impeded by the clumping of skin cells and oil. The zits that appear
white with fluids are pustules, develop when the bacteria, P.acnes
, is lured in the follicule and serve on the oil to grow. The
bacteria produce irritating enzymes, and free fatty acids. At this
point, in the follicule , all the contents are causing pressure,
and as a result, the wall ruptures, spilling all the irritating
fatty acids, and contents on the skin. The body responds to the
irritation by sending white blood cells in order to clean up the
situation, however it overdoes it, and the result is inflammatory
lesions, such as zits filled with white pus, which is white blood
cells.
And squeezing is one of the worsening factors that worsens acne
rather than improving them. Picking and squeezing them causes the
pus in the zits, to burst inwards rather than outwards, may even
risk in scarring. Hope this helps.
