Cavities are damaged areas in the hard surface of your teeth that develop into tiny openings or holes. Cavities, also called tooth decay or caries, are caused by a combination of factors, including bacteria in your mouth, frequent snacking, sipping sugary drinks and not cleaning your teeth well. Best homeopathic medicines for cavity are Chamomilla, Arnica, Belladonna, Mercurius, Hepar sulph, etc...
Next Steps
Consult homeopathic physician.