I keep having issues with iTunes

Recently, I've been getting various messages that iTunes can't sync with my iPhone 6, can't process an iTunes purchase (which I haven't bought anything anyway), and it can't currently process something (can't recall the message exactly). Is it okay to uninstall iTunes and reinstall?

I haven't done anything recently that would generate any iTunes problems so I don't know what to do.

Thanks for any recommendations to solve this problem.