yes, it was not clear that you where talking about updating the profile.
edit line 97:
header('Location: users_profile.php');
to:
header('Location: users_profile.php?updated=true');
then add the following after the <body> tag to show a message:
<?php if(isset($_GET['updated']) && $_GET['updated'] == "true") { ?>
Your profile has been updated
<?php } ?>