To see or wear a diaper in your dream, symbolizes your childish or babyish attitudes/actions. You may be too dependent on others.

To dream that you are changing diapers, suggests a need to clean up you behavior and change your childish ways. Perhaps you need to change your attitude and approach regarding a new idea or project.

To see dirty diapers in your dream, indicates that you need to clean the mess you have created with your childishness.