There are several products available in the market containing ingredients like tretinoin, hydroxyquinone, arbutin, kojic acid, azelaic acid, alpha hydroxyl acids,
niacinamide etc.; that may be helpful. However, these should be only used after consultation with a dermatologist, especially on the face due to the skin being sensitive than rest of the regions. You may try reposting your query in the Dermatology community (This is the orthopedics community)
Hope this helps.
Take care!