Thanks for your query.
You seem to have post inflammatory hyper pigmentation following acne
. I presume that you don't have active acne now.
You may do as follows:
You may take a few sessions of glycolic peel or TCA
Apply a hydroquinone
cream at night.
Use a sunscreen with both UVA and UVB protection during the day. Repeat it every 3-4 hours.
Avoid sun exposure as much as possible.
Take oral supplements of Vitamin C
,E and beta carotene
Drink plenty of water.
Take a Balanced diet rich in minerals and antioxidants in the form of fruits and vegetables.
Since you are a big foody ,you can take junk food in low quantity.
The above treatment will help in reduction of pigmentation and also help in getting an even toned and glowing skin . But take this treatment under dermatological supervision.
Hope this solves your query.