Thanks for the query,
These black spots are post inflammatory hyper pigmentation.
You dont need to worry much.
These spots will heal within a months time.
You can use a mild steroid
cream like fluticasone
for early relief.
Please meet a dermatologist
for exact diagnosis.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you good health,