There are a few ways to add flames in Photoshop. The first way is to use the Burn tool. To use the Burn tool, you need to click on the Burn icon and then select the target area of the image that you want to burn. Then, drag and drop the flame onto the target area. The second way is to use the Flare tool. To use the Flare tool, you need to click on the Flare icon and then select a point in your image that you want to flare out. Then, drag and drop the flare onto the point. The third way is to use a gradient tool. To use a gradient tool, you need to click on the Gradient button and then select one of your colors from within Photoshop. Then, drag and drop it onto your image so that it covers all of your target area.