Is dream interpretation related to a Muslim's faith, and is it obligatory for a Muslim to believe in it? And what is the interpretation of a dream about teeth falling out?

Legal rulings are not derived from dreams, nor do dreams necessitate action. Their interpretation varies according to individuals, times, and places. The enquirer is advised to consult trustworthy specialists in dream interpretation, as the Prophet (peace be upon him) said: "Do not narrate a dream except to a scholar or a sincere advisor."