What is anxiety?
First of all, it is important to be aware that anxiety is a normal response to what is happening around us. In other words, it is warning us about negative things which might come up.
However, anxiety can become a problem when it is experienced out of context or even exaggerated. In some cases, it can turn us into an irrational person to the point of developing an unhealthy stress pattern.
For example, if you were to jump over a bridge, a certain level of anxiety would probably prevent you from doing it. But if you were anxious about crossing the bridge safely by car or by foot, this would be an abnormal and irrational response, which means that it would be an unhealthy level of anxiety.