Hi,thanks for posting
is a very common condition seen in adolescent age group.
It may be mild in the form of comedones ,
small red round papules that may have pus
In most severe cases hard big cystic nodules.
acne generally occurs till 25-30 years of age.
It is unlikely to be some other problem from the details you have mentioned.
So I suggest you to go ahead with the treatment as advised by dermatologist
. some times resistance occurs toconventional treatment, so you can meet the doctor again.
hope this adresses your concern