The duration of an Instagram block is indefinite, meaning it does not automatically expire after a specific period. When a user blocks another on the platform, that block remains in effect until the blocking user manually removes it. There is no inherent timer that reverses this action. This is a key element of user control regarding interactions and content visibility within the application.
This feature provides individuals with the ability to curate their online experience by preventing unwanted interactions and safeguarding against potential harassment or unwelcome contact. This has consistently been a feature since the platfrom was launched. The persistence of the block ensures that the blocked user cannot view the blocker’s profile, posts, or stories, nor can they contact them directly through direct messages.