Dream dictionaries commonly connect the mouse with modesty, fear, insignificance, and minor but persistent annoyances. The symbol may appear when you feel overlooked, hesitate to assert yourself, or allow small concerns to occupy too much mental space. Because mice move quietly and often hide, the dream can also draw attention to something you have noticed but have not confronted openly.
The scene changes the emphasis. A mouse hiding in a wall or room may represent an unresolved issue that remains out of sight. Many mice can point to several small demands accumulating at once, while a dead mouse is often interpreted as relief from a nagging problem or the end of a period of hesitation. If you catch or chase the mouse, the dream may reflect a more active response to pressure. Consider your personal attitude toward mice as well: affection, disgust, or fear can strongly influence the meaning.