Open the Tik Tok application and click the "Me" tab at the bottom of the home page.
After entering the personal homepage, click the "+"sign in the upper right corner and select the "live broadcast" option.
After entering the live interface, click the "Special Effects" button in the upper right corner of the screen.
In the special effects interface, find the "Flame" option.
After clicking the "Flame" option, find the "Purple Flame" option and click Select.
After selecting the special effects, you can click the "Start Live" button at the bottom of the screen to start the live broadcast of the purple flame special effects.
It should be noted that the purple flame special effect may need to be used under certain conditions, such as reaching a certain popularity or level requirements. If you can't use the purple flame effect, it may be because your account does not meet the corresponding requirements. You can try to improve your popularity or level first.