Why is Messenger not sending or receiving messages?

When Messenger is not sending or receiving messages, the cause is usually one of a few common issues. The most frequent one is a weak or unstable internet connection, which can prevent messages from loading or being delivered. It can also happen if the app has a temporary glitch, needs an update, or has cached data that is interfering with normal use. Another possibility is that the conversation is affected by account, privacy, or blocking settings. If messages appear to fail for only one person, the other account may have restricted communication, deactivated, or changed message settings. If the problem happens with every conversation, the issue is more likely to be device related or service related. It can help to check whether Messenger is working on another device or through the web version. If it works elsewhere, the issue is likely on the device. Restarting the phone, updating the app, clearing cache, and signing out and back in can often fix it. If the problem started after a recent update or system change, that is also worth noting. If you are trying to reach support details, look on the current web page for contact information, since that is usually the safest place to find the latest options.