Is there a waiting period after changing your Twitter username?

Yes, there is a waiting period after changing your Twitter username. According to Twitter's help center, you cannot change your username back to a previous one within 30 days. This is to prevent users from frequently changing their usernames to impersonate others or for other malicious purposes.

However, you can change your display name immediately after changing your username. The display name is separate from the username and can be changed at any time without any restrictions.

Keep in mind that even after the 30-day waiting period, someone else could have taken the username you want to revert to. It's a good idea to check if the username is available before attempting to change it back.