this is pitta vikar problem.Acne is an inflammatory condition of the sebaceous glands and hair follicles .Root causes are- Irregular hours of eating, excessive consumption of starch, sugar, fried & fatty foods,Toxins (ama), formed due improper movement of bowels, finding their way into the blood stream.You should use Sandalwood, Turmeric for local application Neem (Azadirachta indica) Giloy (Tinospora cordifolia).along with kaishore guggule, arogyavardhini vati,and any blood purifier like radona should be taken.ifu have any other problem,you can contact me personally.

Pimples and dark circles are succesfuly treated in Ayurveda with the herbal preparation, home remedies and change in daily behaviours.
Sandalwood,. turmeric, aloe, and neem are the best herbs for skin.
For the removal of toxins Blood purifier should be administered in all skin cases like Gandhak Rasayan, Radon etc,
Kumkumadi Lepam, Perolap face packs , Medicine ZAP and CLear for local application is popular.
Classical ayurvedic medicines are
* Gandhak Rasayan
* Arogya-vardhini
* Sukshma Triphala
* Chandraprabha
* Shankh Bhasma
Advices
If constipation , it should be treated accordingly.
Associated dandruff should be treated.
Avoid excessive fatty & oily food stuff.

Thanks