CLion freezes when iostream is included

CLion continuously freezes when iostream is included. It didn't do this until after a day or two of using it. Specifically, whenever I type the "#" character it hangs for a few seconds. Unsure why this is happening, it would be great if it would stop. If iostream has not been included the problem does not arise. Please let me know what error logs and such I should attach to this as I'm fairly new to CLion and don't know what information I need to provide.