Why does my iTunes keeps detecting my iPod in recovery mode?

I once plugged in my iPod and iTunes said it was in recovery mode and couldn’t sync. So I was like, “Ok,” and backed up all my music and pressed restore. My iPod restarted. Then iTunes detected it——but it STILL said my iPod was in recovery mode. I’ve restored my iPod like 5 times and iTunes still can’t detect it. Now I have no music on my iPod. (It’s a nano by the way)