Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain dark marks on legs caused due to injury while playing on ground along with dark marks on face secondary to pimples seems to be due to post inflammatory
hyperpigmentation..
I would suggest you to apply a steroid ointment over the marks on legs..
They can reduce to some extent but complete fading is a bit difficult..
For face start washing your face with
Salicylic acid containing facewash..
You can apply creams containing
Kojic acid,
glycolic acid and arbutin over the pimples..
You can apply Vitamin E gel..
Exfoliate your skin twice a week with a gentle scrub..
You can also go for treatments like
Microdermabrasion, chemical peeling and photofacial..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.