Hi, this is acne
, which srarts at this age. it occurs due to hormonal
changes within our body.
Black heads and white heads form because of acccumulation of oil in the oil gland ducts which further progress to raised lesions.they heal off leaving pigmentation and scars
which may or may not be obvious but if it is picked or peeled the chances of pigmentation and scarring are more. they take a long time to heal.
This isvery common in your age group so dont feel embarrased about it. discuss it with your mother .
To be very frank you cant get rid of it in a day.
I suggest you the following -
use a salicylic facewash twice a day.
adaoalene gel for comedones(blackheads and white heads) dont peel these
for dark marks use kojic or azelic acid creams at night.
.hope this helps you