The footnote number is appearing too big when I'm compiling

Hi! I’m new to the app and I’m having a problem. As you can see in the attached image, the footnote number is appearing too big when I compile my file. What can I do to solve this problem? Thanks!

Image: dropbox.com/s/w9aysm6n4uuuw … 1.png?dl=0

(note: could’t attach the image file because the size is “too big”) (!?)