For some reason, my scalp

For some reason, my scalp has been incredibly itchy for the last 24 hours or so. Is this the symptom of something awful? Is there an easy cure? Advice welcome.
Also, for some reason, I seem to often start sentences with the words “for some reason”. I think this is because life is all just a bit strange at the moment. But strange in a good way. At least, I *think* it is good. I *hope* it is good. I’m not really sure.