There are many factors or Stress Builders involved in the accumulation of occupational stress. Stress can stem from something as little as your breakfast burning to something as major as being the President of the United States. Perfectionism is an attribute to the stress building process. Putting constant pressure on yourself to achieve, be the best and always trying to make good impressions on your co-workers can add a lot of unneeded pressure to your life. No one expects you to be perferct.
Control is also a factor in determining a person's stress level.
If one is unsure of themself and of their abilities then they will always be worrying about the work they do. On the other hand a person who is confident in their work will just turn it in and not worry about it after that. Imagine a working mother who is scheduled to be at work before her children can go to school. This just adds anxiety to the mother's already hectic day. She is going through role conflict.