Check your followers list and compare it with a previous list or screenshot
Use Instagram’s search to look for the person’s profile and see if you still follow each other
Visit the person’s profile to see whether they still follow you
Review recent follower changes manually after noticing a drop in follower count
Use a trusted third-party follower tracking app only if you understand the privacy and security risks
Check your Instagram notifications for any follow or unfollow activity you may have missed
Ask a mutual follower if the person still follows you
Compare your current followers with a saved export or manually recorded list