HI, thanks for posying your query
Acne starts during puberty as a result of
hormonal changes, which stimulate oil glands to produce oil which collects in the gland ducts and leads to black and white heads, pimples which may heal leaving pigmentation and scars
IT is very common to see new acne just before the periods because the hormones are at high levels .
The following measures may be of help:
Dont pick or squeeze the bumps as it increases chances of pigmentation and scarring
Get the white heads extracted regularly
Use a salysilic face wash twice a day
Use
tretinoin cream .025% on the acne prone areas at night
FOR the
acne scars you can undergo punch excision,
microdermabrasion, subscision , Fraction laser as per dermatologist's advice
for premenstrual flare various medicines have been tried like
Pyridoxine(vitB6)50-200 mg per day
Ibuuprofen or
rofecoxib tablets
These are started 1 week before onset of periods till the periods last , but should be taken only by discussion with your doctor.
Hope this answers your query