There are many forms and methods to make flame characters with PS. Here is an example. The specific method is as follows:

1. Create a new document and fill it with black.

2. Type the text as follows:

3. Use the blending option for the text layer, and use specific parameters as needed, as follows:

4. The effect diagram is as follows:

5. Use the daubing tool for treatment, as shown in the following figure:

6. Find the flame image in Baidu pictures, as shown below:

7. Open the flame screen and select-select the brightest place with parameter 200, as shown in the following figure:

8. Drag the extracted flame into the text document and adjust its size and position, as shown in the following figure: