Admin Panel Hangup Issue

I am slowly getting a worse and worse problem with my admin panel as I add more items/pages to my store.

Whenever I go to save a product, or upload an image to a product, the admin panel does in fact save the item (or upload the image) but it lands on a blank white screen.

I have to click back in the browser window in order to see the panel again.

I’ve found that clearing the cache helps out, but that only lasts for a couple of new items, and then back to same issue again.

Any suggestions/tricks on how to clean up the panel and/or my store to avoid having a slow and hanging admin panel? My live store works great, so I don’t think it is a hosting issue.

Thank you in advance for your suggestions!