What can cause the left side of the head to tingle and feel strange?

Even sleeping the wrong way in bed can cause a pinched nerve in your neck. Pinched nerves can cause tingling down your arms, legs and up the back of your neck. It effects the nerves in that part of the body, thus a tingling. Get someone to give you a good shoulder/neck rub and it should soon disappear. Also A535 rub is great to rub on the tops of your shoulders and neck. If it persists go see a chiropractor. I have just been to the doctor regarding something similar and he suggested it is shingles, even though I don't have a rash.