Nervousness- what are its effects on the body?

Too numerous to list. The effects are too numerous to list here so I am referring you to a comprehensive website with an excellent overview of the effects on all of the various organ systems in the body. Best wishes. Helpguide.Org/mental/stress_signs.Htm don't let stress hijack your life. Learn the signs and causes of stress overload and what you can do to help yourself.