While their size and shape vary with location in the nervous system, most neurones contain the same parts: a cell body; a number of highly-branched outgrowths of the cell body called dendrites; a single, long nerve fibre (or axon) extending from the cell body; and branches at the end of the nerve fibre (axon terminals).
My doctor said that usually happens when blood pressure is high and you get that strange head sensation. But as I was reading some documents on net, I found out that it could also be some sort of a panic attack. You could try next time it happens to relax, try thinking on some peaceful place, and just calm down.
Shingles can cause tingling and numb feeling on one side of the body along with other symptoms like fever, blurred vision, headache and change in taste. Other infectious diseases like Lyme disease and post herpetic neuralgia can also cause tingling and numbness sensation on the back of your head.