However, when nervousness appears for no reason, doesn't go away and interferes with daily life, it may be an anxiety disorder. Experts tell us that anxiety disorders are the most common of all emotional disorders. One in four Americans may suffer from an anxiety disorder in their lifetime. It may be beneficial to see if lifestyle changes will affect your nervousness. Caffeine and not getting enough sleep can exacerbate problems.
Exercise is sometimes a benefit.
Anytime someone has problems with nervousness, a physician may want to make sure that there is not a physical problem going on. Also many people with problems with nervousness or depression may self medicate with alcohol or drugs. Less than two years ago they stopped for some reason. I have experienced maybe one or two of them since then. There is a likelihood that you may have them again in the future.