Hi Sam, I didn't have that kind of trouble, but it sounds like herpes zoster. It is a viral desease which comes along with skin rash and scab as you describe it, usually in a circular shape like a belt. Look it up in the web and if it applies to your issues you should visit a dermatologist or at least a general practitioner. There are antiviral meds to stop the rash from spreading and pain relievers if necessary.