Create a burning effect in no time at all!
On a new layer, grab the Pen tool (P) and draw a path. Go to Filter>Render>Flame and choose the style that you would like. Click OK. Cmd/Ctrl+click your layer preview and Cmd/Ctrl+T to transform your flame, then warp it into position.
Duplicate your subject and flame layers and merge. Go to Filter>Blur Gallery> Path Blur. Uncheck Centered Blur; choose Speed: 219%, Taper: 0%, Strobe Strength: 99%, Strobe Flashes: 100. Drag the red arrows to extend the blur and give this image a lot more motion.
Adjusting your picture can really add realism; use Gradient maps to unify the colours of the fire and the subject, and merge everything together (Cmd/Ctrl+Alt/Opt+Shift+E) before using Camera Raw to sharpen everything up, and increase the clarity.
Blurs are extremely important too; Path blur can help to redirect the flames, and Gaussian Blur is useful for adding a little soft focus to the image. Creating a fiery composition couldn’t be done without filters – not just to generate the flames. While Camera Raw can handle bigger adjustments, a nice touch is to slightly distort the picture to add an extra feeling of heat. Go to Filter>Distort>Ripple and choose 50%.