A lot of people face disappointment and extreme regret at work after they have already entered the industry. Monster talks about some careers people seem to regret a lot, because knowing what kind of careers people have most regretted will help you make a better informed decision should you happen to be interested in these careers.

Have you ever found yourself doing a job you don't just hate, but are completely wearied by? You are not alone. Corrective measures is another thing, (you could look up career switches that will take less time, energy and preparation that others) but preventive measures are always better.

Following are, according to the job hiring monster company, careers that people have regretted a lot.

1. Cashier

Unbelievably, 46% of cashiers say they regret their jobs. You need to spend a lot of time dealing with the public, and if that is not your thing, you're in the wrong job. If you find dealing with people frustrating, you are not going to find this job very satisfying. You will need a real service mentality for this career, so beware - if you don't have it, don't go for it. Cashiers earn an average yearly pay of $18,600.

2. Mechanic

43% of mechanics say they regret getting this particular job. While it is true that many people who enjoy cars and engineering love being a mechanic, they have to be prepared for some seriously heavy labor, long hours, expensive tools and getting dirty. It is no air-conditioned office job, that is for sure. With an average yearly pay of $36,100, many mechanics think the work is not justified the money they make.

3. Secondary School Teacher

Unless you really love children and can stand them for long periods of time every day for almost all days of the week, you will not think that the average yearly salary of $43,800 is worth it. Secondary school teachers actually rank third in regret with 43%. The main reason for this is probably that they don't think ahead before they get into the job how noisy, loud, chaotic and physically exerting this job is. Children are not easy. 30 children for eight hours a day, five days a week plus trips, fairs and school events? It can be a nightmare for those who don't consider themselves 'children-people'.