Definitely get some blood tests done. Something like gallstones or fatty liver can cause disruption to your liver enzymes and cause itching, which you would want to know about, or even other things to do with your kidneys, thyroid, pancreas or lymphatic system. I beleive there are some mineral/vitamin deficiencies that can cause generalised itching too. In any case, if it doesn't go away after a few days, worth getting checked out for peace of mind before you start chugging down lots of over the counter medications.