Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain it seems that you have got post inflammatory
hyperpigmentation caused due to popping of pimple that caused inflammation and darkening..
Tri-o-bloc cream contains Arbutin that is effect in depigmenting the pigmentations..
You can also apply
kojic acid and
glycolic acid containing creams as they also help in reducing pigmentation..
You can wash your face with glycolic acid and
salicylic acid facewash like AHA GLOW,Melaglow or others..
You can scrub your face with a gentle scrub, take Vitamin C supplements and limit sun exposure..
You can apply a Non-comedogenic [anti-acne] sunscreen lotion when you go into sun..
You can also get glycolic acid peeling and photofacial done for improvement by a trained
dermatologist..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.