The answer to this question lies in understanding the concept of "mind-body" relationship. For example, when someone is appearing for an important examination, he/she may experience palpitations, trembling, sweating, abdominal discomfort, breathing problems and many other physical symptoms. In this case we realize that these problems are due to anxiety
in the mind. The same holds good for chest pain
which develops following excessive worrying or stress
There are many ways of dealing with such problems. If stressful situations can be avoided, then anxiety will automatically disappear. In todays world, however, it is difficult to remain stress free. Therefore, adopting a healthy lifestyle with proper time management and relaxation, along with positive approach to life can help if the anxiety is mild. For more severe problems, it is better to take professional help.