Unity Hangs on Running

Hi there, I’ve an project which for some reason, has started to hang and become unresponsive when I press play; I can load it, move objects around within it etc, it just hits a problem on running which means I have to force Unity to close. Is there a cache or something I can clear to hopefully resolve this issue?

Thanks

Yeah the same happened to me but I realized I had an infinite loop in the code and when I took it out it started working again. So take out any infinite loops!