Thanks for the additional information,
Well it sounds like this feeling that you have can be classified as parasthesias which is an abnormal sensation over the skin due to a disorder with the nerves, This can be due to many problems including chronic disease like diabets, hepatitis C among other causes. This can be du to vitamin deficiencies, amyloidosis, medications, heavy metal porisoining etc.
This si a relatively common condition which can be easily diagnosed with the help of certain tests like that of Nerve conduction studies (NCS) and also by a detailed clinical examination to look for other neurological deficits in the body.
It can be treated wby first determining the undelrying cause and then treating that cause for example it can a B12 deficiency an treatment would be B12 replacment. APart from that the treatment centers around the use opf medications like Neurontin. Lyrica and TCA antidepressants
. In addition taking B12 supplemenets can also help even if you dont have low levels of B12.
Another possible cause can be fibromyalagia in which patients experience abnormal sensations in the body as well. The treatment is the same with the aditions of SSRIs.
I would suggest scheduling an appoinment with ypour neurologist and getting this checked with the tests that i have described above and also a clinical examination. I hope this helps