The initial step to melasma treatment Singapore would be to confirm with a dermatologist about the darkened skin patches are melasma or not. You should also determine with the dermatologist about the cause of melasma. Rest assured that treating melasma would be effective provided you do not address the underlying cause.
The oral treatments for melasma would be pointless if you do not address the triggers. For people being constantly exposed to exacerbating aspects, you could be wasting your time with the treatment, as the triggers would not let you seek the desired results. It would be in your best interest to look for the best dermatologist.