Thanks for your query and Welcome to HCM forum.
You had pimples on your face and you did chemical peeling by Salicylic acid
, then you have got chemical peel-induced postinflammatory hyperpigmentation
Firstly, you have to be patient as the "dark spots" can take several months or more to resolve. So, the marks are not permanent. Topical retinoids, azelaic acid accelerate the resolution. Depigmenting agent like 2% Topical hydroquinone
cream (OTC) can be applied twice daily to individual hyperpigmented lesions for greater improvement. Consult with a dermatologist
for better management of your pimples.
Hope, this helps.