Civic EG

okay i hope no one has already had this problem i checked i didn't see any really the same as mine close but not the same. but basically my gas gauge hops up and down when ever it wants and as fast as it wants sometimes idk if im out of gas because in ten seconds it can go up or down. what can be the cause of this ?

mine does this but its more like whenever i go up or down a hill, it goes up or down, anybody havr a fix?