I need my PHP page to show my BLOB image from mysql database

In your current case, you have two upfront options.

The first, and the one I don't recommend if you have numerous images like this, is to use inline base64 encoding. This is done with:

<img src="data:image/jpeg;base64,<?php echo base64_encode($image); ?>" />

A copy/paste version, using your existing code:

echo '<dt><strong>Technician Image:</strong></dt><dd>'
     . '<img src="data:image/jpeg;base64,' . base64_encode($row2['image']) . '" width="290" height="290">'
     . '</dd>';

The second method is to create an "image" PHP file that takes the ID of the image in the database as a query-string parameter and outputs the image. So, your HTML would look something like:

<img src="image.php?id=<?php echo $image_id; ?>" />

And your PHP page would look something similar to:

<?php
$id = (isset($_GET['id']) && is_numeric($_GET['id'])) ? intval($_GET['id']) : 0;
$image = getImageFromDatabase($id); // your code to fetch the image

header('Content-Type: image/jpeg');
echo $image;
?>

The only way you can output an image from the same page as the document is with a data uri.

echo "<dt><strong>Technician Image:</strong></dt><dd>" . 
     '<img src="data:image/jpeg;base64,'.
      base64_encode($row2['image']).
      '" width="290" height="290">' . "</dd>";