dental flurosis happens due to more mineral content in drinking water, so now your teeth are having stains on them nothing can be done to reduce the stains basically.
more advanced procedures like teeth whitening, bleaching, composite or ceramic laminates or veneers and even Ceramic crowns come with pros and cons of treatment.
Next Steps
get scaling done and be happy.
Health Tips
if you have high esthetic demand then go or invasive procedures if not, simply get scaling.