Think your job is stressful? Try being an urologist.

Stressed woman leaning against pole, head down
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Every job carries a certain level of stress—but the most stressful jobs undeniably take a greater toll on workers than low-stress jobs do. Some people are attracted to these jobs for the challenges and rewards they offer, while others would like to avoid stressful careers. But how do you know if a job is going to be stressful or not?

The Occupational Information Network (O*NET), a U.S. Department of Labor/Employment and Training Administration–sponsored initiative, has the answers. Determining levels of stress is difficult, as everyone carries stress differently and some are better equipped to handle it than others, but the O*NET Resource Center has developed a list of the most stressful jobs based on the amount of stress tolerance people in that field must possess.

These jobs require “accepting criticism and dealing calmly and effectively with high-stress situations” and, unsurprisingly, many of the jobs at the top of the list involve facing life-and-death situations. The 10 most stressful jobs are:

1. Urologist

2. Anesthesiologist Assistants

3. Nurse Anesthetists

4. Telephone Operators

5. Acute Care Nurses

6. Dancers

7. Obstetricians and Gynecologists

8. Police, Fire, and Ambulance Dispatchers

9. Surgeons

10. Transit and Railroad Police

Six of the top 10 most stressful jobs are in the healthcare field, but telephone operators and emergency dispatchers also made the list, proving even desk jobs can be taxing.

Notably, all the jobs O*NET ranked are at least a little stressful: Even the least-stressful profession, Models, had a stress level of 24 (out of 100).