Lately I have noticed that my arms and legs seem more sensitive to pain. They feel normal until I scratch an itch or press on certain spots, there's usually a slight delay after applying pressure and then pain. At first I thought maybe I had edema, but I don't notice any visible swelling. I don't know if this is at all related but I've also been having difficulty sleeping because when I lay on my side I can feel an irregular feeling pulse in my throat. Should I be concerned or am I working myself up over nothing?