Injuries can be edited and/or deleted via the table of injuries.
Navigate to your Injuries list:
Under the actions column you will see a pencil icon (edit) and trash can icon (delete) depending on the permissions of your role:
Edit an Injury:
Click on the pencil icon to edit the applicable injury.
This will take you into the injury form:
Edit then ensure you Save the injury once you are finished.
Delete an Injury:
Click on the trash can icon to delete the applicable injury.
You will then be presented with the following warning:
Click 'Yes, Delete' to confirm.