Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that dark scar after applying garlic over the pimple has caused chemical burn over the face causing post inflammatory
hyperpigmentation, and at times it can take a long time to resolve and can take even 4 to 6 months for resolution..
Treatment that can be done is a combination of topical
depigmentation creams and certain techniques..
You can start washing your face with
Salicylic acid and glycolic acid containing facewash..
You can apply creams containing Kojic acid, glycolic acid and arbutin..
Vitamin E and C containing creams can help..
Creams that are rich in licorice extract and grapeseed extract can be helpful..
Always apply a sunscreen lotion to reduce
photosensitivity effect..
You should exfoliate your skin twice a week with a gentle face scrub..
Treatments like chemical peeling, Photofacial,
Microdermabrasion, dermal rollers etc can be helpful..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.