How come I can't change my username?

[Fall Out Girl]

I went to my profile to change it, and now it's just bold and there's no box to change it...

-Indy

[Battousai The Manslayer]

You have to wait 7 days until you can change it again.

[Marina]

When you change your name and edit it, a screen has showed that told you that your name won't be change within 7 days. You need to wait at least a week to change it. Until then, good luck.