My 83 yr old mother had shingles in December, 2011. Ever since she has had dailybouts of nervousness. It happens sometimes 6 times a day. The only thing that stops it is her taking adavan, which just makes her sleep. Is this condition from the shingles? We have had her to several doctors and no one seems to have any answers. And if it is caused by shingles, how long will this go on??