Why can i not view my photos after updating

We can't know from your meager information - tell us a STORY so we can know what you know - ÇÇÇ

Quoted from  Apple's "How to write a good question"

To help other members answer your question, give as many details as you can.

• Include your product name and specs such as processor speed, memory, and storage capacity. Please do not include your Serial Number, IMEI, MEID, or other personal information.
• Provide the version numbers of your operating system and relevant applications, for example "iOS 6.0.3" or "iPhoto 9.1.2".
• Describe the problem, and include any details about what seems to cause it.
• List any troubleshooting steps you've already tried, or temporary fixes you've discovered.

TTell us more, please. Which upgrade do you mean?

where your photos in the camera roll or in the photo stream? did you have synced photos on your iPhone? did you use iPhoto or the photo.app?