One of the many reasons that you might dream about being naked is your lack of security in your surroundings or that you feel ashamed about something.
You might also be hiding something that you feel people can see. Clothes are a means of concealment. It could be something as simple as being in a new position at work or dating someone new and you are afraid to show your true feelings.
Being nude can also mean that you feel like you are being caught off guard. You might not be prepared for an event and it comes out in your dreams as being nude.