A couple of weeks ago I woke up to an unusual pain or strain in my neck/head/left shoulder. I retraced the previous day's events and couldn't figure out why or where this pain emanated. This appeared to have happened in my sleep overnight. The only thing I could think of was that I sometimes carry a heavy load in my laptop satchel which I sometimes carry on my left shoulder. Regardless of how the, we'll call it strain, appeared, I was looking for any way to eliminate my pain