Thanks for writing in.
can be due to postinflammatory changes.
Sun exposure can aggravate pigmentation.Keeping the sunprotection is important to treat hyperpigmentation. Use sunscreen with SPF 50.
Effective oral and topical medications are now available for Hyperpigmentation .
My advise to you would be to use topical triluma cream with good moisturizer.
Few treatments like microdermabrasion
and kojic acid
peel can help to spots effectively.
Consult a good dermatologist
who can provide you with these options along with effective oral prescription medicines.
Hope this helps.