Hello Roopa ,
Your problem might have developed either due to stress , lack of sleep , lack of nutrients, lack of skin care , etc.
For clear complexion use a face pack of besan +sandal wood powder + turmeric+lemon juice at least 2 times per week. And you need to follow the routine of cleansing , toning and moisturising with gentle and good quality products.
For essential oil remedies for your skin you can consult me.
Regards,
Dr. Heena