Can I edit my Photos pictures in Adobe Photoshop CC?

Which version of Photos are you using?

In Photos 4.0 on Mojave you can also use the "Image > Edit with" menu to call any external editor you like. But not all of them can save the edits back to Photos.

Not all apps play nice with Photos out of the box you can get the External Editors plug-in from the app store that will take care of everything for you. There is also the free Open In app.