Usually mice are associated with fear, obviously not an all consuming fear, but mice are still a dream symbol for a more petty type of fear. The way that mice are depicted in the media is as objects of fear. Most people picked up on this at an early age from viewing cartoons or other shows that depicted mice to be scary. This means that whether or not we are scared of mice personally, they still will likely symbolize some kind of fear for us in terms of dream meanings.
A dream dictionary will occasionally have different dream interpretations for mouse and for the plural form mice. The dream interpretation for mice differs from the dream meaning of mouse in that if you are dreaming about a singular mouse it symbolizes fear, while if you are dreaming about multiple mice, it symbolizes that you are dealing with minor things of little consequence and are spending too much time doing it. Mice are small creatures and even if they are scary, in reality we are more than capable of dealing with a mouse, or even multiple mice, and exterminating them if need be. If you are consistently spending time with them in dreams, then maybe it is a signal that you are not overcoming some boundaries that you should be perfectly capable of overcoming normally.
Take a dream about mice to mean that you should take a step back from the things that you have been doing in life, and consider what values are most important. Consider what things you find to be of little value to you personally. Then think about how much time you spend on each. If you spend too much time on petty matters, then maybe your dreams about mice will stop when you learn to prioritize better. However, it is perhaps also possible, if you find that you are not spending too much time dealing with petty matters, that the meaning of dream about mice was that you are actually fearful. If you are afraid of something, there are usually different dream symbols for fear. The mouse is one of the least threatening symbols, meaning that whatever you fear will only turn out to be a small issue or no issue at all.
Another more obscure interpretation of what it means to see mice in your dreams is that you are feeling inadequate, especially if you put yourself in the place of the mouse in your dream. Possibly you feel that someone else is bigger than you, or that you can't match up to the legacy of someone else in your life. If this is so, then you might be seeing a few mice in your dreams. The best way to deal with this is to simply sort out your feelings as best as you can.