Why do some call anxiety a nervous disorder?

[uk23]

This might be a stupid question so sorry if it seems that way but is anxiety/nervousness called that because your nerves become sensitive which causes the pins and needles, tickling feeling, pin prick sensation etc that some of us get?

[BasilCat]

Anxiety is an illness of the nerves. They have become senstitised. If you read Claire Weekes, Essential Help for your Nerves, it will explain it clearer in there.

BC