Hello Bekahl,
It sounds like you have photos on your iPod nano that you would like to remove. These pictures would have had to have been synced over through iTunes from a folder on your computer. This article outlines how to sync photos to your device, but you can also use it to disable photo syncing and remove them as well:
iTunes: Syncing photos
http://support.apple.com/kb/ht4236
- In iTunes, click the Device button in the upper right corner. (If viewing the iTunes Store, click the Library button in the upper-right corner first.)
- Click the Photos tab in the resulting window.
- Choose "Selected albums" and deselect the albums or collections you want to delete.
Note: To delete all synced photos, deselect "Sync Photos from" and, when asked, click "Remove photos."
- Click Apply.
Thank you for using Apple Support Communities.
All the very best,
Sterling