If you cannot see tracked changes when you open your edited document, then you may need to disable Simple Markup. Take the following steps to display the tracked changes.
Notice that the display is set to Simple Markup, which is the default document view in Microsoft Word 2013.
Click the drop-down arrow and scroll down to select All Markup. Tracked changes should now appear.
If changes are shown inline, then you can make the document easier to read by showing them in balloons. Select the Show Markup drop-down, then Balloons, then Show Revisions in Balloons.