Rather insiteful
It may sound strange, but some people actually get excited about certain times of frustration. They feel restlessness followed by dissatisfaction. They can't identify the cause. Then they know the Lord wants their attention. Once they make the move He desires, frustration will end. They're in sync with His plan for their life.
Frustration is usually considered a negative feeling. But, when God irritates us, His purpose is always good. He sometimes uses spiritual and physical barriers to guide us toward new insights. Pray about these feelings and ask the Lord to reveal His will.
In a culture of busyness, we can easily and foolishly overlook or ignore restlessness. But divinely sent frustration is meant to get our attention. God wants us to ask questions like "What are You saying?" or "Do You want me to be doing or thinking something different?"
As soon as we're willing to deal with whatever the Lord brings to mind, things will change. He reveals what we need to change to receive His insight.