Thanks for the query. Dark spots could mean many things. I assume what you mean is probably post inflammatory pigmentation. Targeting through a single agent may not always be fruitful. Meet a qualified Dermatologist to learn more about the diagnosis and treatment options. Combination of different therapeutic agents is always beneficial. Revlite I.e. Q-switched Nd YAG laser has been available for stubborn pigmentation and can be helpful when topical creams fail.
Chemical peels will also help
Next Steps
Your dermatologist will decide a treatment plan for you after a consultation.
Health Tips
You can consult me online for personal recommendations.