Anxiety will alter the amount of carbon dioxide in the blood, and
if you hyperventilate while anxious there can be all sorts of
odd sensations. Usually they are around the mouth. But top of the head is a prime spot for doctors to make this diagnosis.
Really severe hyperventilation will affect everywhere. Not just some locations.

If you know you are anxious there are two supplements you can try. One of them, L-theanine...is also recommended for sensory neuropathies. Doctor's Best makes a good one. You can start there. 2 capsules twice a day and see what happens. This was recommended in Dr. Blaylock MDs newsletter and if you search
"theanine" here you will find posts about it.

Secondly you can start with magnesium soaks with epsom salts, at night before bed in the bathtub (6oz to a tub of lukewarm water for 20minutes to a 1/2 hr or more). This will relax your muscles and take the tightness away. Some will also be absorbed and help you sleep. If this works, then you can take a supplement like SlowMag twice a day.

Another anti-anxiety OTC product is PharmaGaba. This form is more easily absorbed and gets into the brain and works like a mini-Valium, without the addiction or sleepiness.
There are a few PharmaGabas out there, but they are very
expensive.
This one is not and works for me:
http://www.amazon.com/GABA-Supplemen...rds=pharmaGaba

Subjectively your anxiety should be less with either or both
theanine and pharmaGaba.

The magnesium is really important to nerves however and muscles, so start with that as soon as you can. Many of us on PN here use magnesium daily, in one form or other. Avoid the oxide form, as it doesn't get absorbed.

Here is my magnesium thread...
http://neurotalk.psychcentral.com/thread1138.html

If you don't have results for B12 and Vit D...then you need to
get those measured. That is the first thing for people with nerve symptoms and pain.

Think back to when this started. Were you ill? virus? food poisoning, or did you take antibiotics for something?
Were you exposed to chemicals, toxins, insecticides, garden chemicals? Do you have well water? If so get it tested for arsenic.

Look at your diet. Do you eat MSG in processed and restaurant foods? MSG is very hard on some people, and in many things, soups, flavored chips like Doritos, sausages, sauces. Check food labels to find it. monosodium glutamate.
Some people become gluten intolerant and neuropathy symptoms can come just from eating wheat, barley and rye.
You may have to alter you diet, to see improvements.
Sugar, and white flour also are stimulants to nerve symptoms, especially in people with impaired glucose tolerance (this is not diabetes, yet, but a beginning to it).

Those are your first steps. Let us know your test results, please.