Displaying a PHP variable from Database along with HTML

I want to display a row that contains a text and an image saved with a PHP Variable from a database.

Exemple:

Row contains: "Some text about something and then <img src="images/$img">"

When i try to echo it's displaying like a plain text

Exemple:

"Some text about something and then <img src="images/$img">" thus the $img = "test.png" and image should be echo like <img src="images/test.png">