As we said in a previous article, Facebook gives them users the ability to send messages from Facebook Messenger to Instagram and vice versa. This means that any Facebook user can send you a personal message on Instagram. If you want to keep profiles separate on both platforms, you can do so. Instagram allows you to block messages Facebook users so that they do not come to you on Instagram:
Press the button menu (three lines) in the upper right corner. In the menu that appears, select “Settings".
Go to Privacy> Messaging.
At this point you can specify who users of Facebook can send you a message on Instagram and who does not.
To prevent them your friends on Facebook (or anyone else you have talked to through Messenger) to contact you on Instagram, tap the second setting in the list (Facebook friends or people you've chatted with on messenger).
The default "Chats" option allows any of your friends or acquaintances on Facebook to send you a message on Instagram. If you want to completely exclude friends from Facebook, change the default option and click on the option that says "Do not receive requests".
The friends of your friends on Facebook They can also contact you on Instagram. If you do not want this to happen, go back to the "Message controls" page and go to "Friends of friends on Facebook“. Change the default option and select "Do not receive requests" again.
Finally, there is a regulation "Others on Facebook", Which allows you to prohibit strangers from sending you messages on Instagram with the same procedure.
The above settings help you control who users can send you messages on Instagram. Many users find it easier to keep them separate Profile and messages on Instagram and Facebook, so these settings are very useful.