as you r taking treatment since 1 year & not getting relief so think another way,
according to ayurveda acne(mukhdushika) occur as the result of impure blood,apathya sevana- improper diet system.constipation
is also one of the reason.
so first of all, avoid junk food,fast food,fermented food
avoid deep fried food,avoid oily food
avoid chinese food,more spicy food
Ample quantity of water,fruits,fruit juices should be taken
Try to avoid constipation.
you can take 1)mahamanjishtadi kashaya 2 tsf twice with half cup of water
2)arogyavadhni ras 2 tbs twice a day with water.
3) sukh sarak vati 2 tbs at bed time or any mild purgative
Wish You A Very nice FACE!!