There are many kinds of troubles found on the job. Number one has to do with relating to other people. But even something positive such as falling in love can cause serious problems when it's at work. Job troubles can also result from environmental concerns. High noise levels, dangerous conditions, or difficult work such as constant lifting all can become problems unless you know how to manage them.
Emotional problems can also cause trouble on the job.
If you don't feel appreciated in your job, or if your chances for promotion are small, you may feel frustrated. If the work is boring, you might not do as good a job as possible. Get enough sleep, food and exercise. Avoid alcohol, drugs, cigarettes, caffeine and sugar. You'll be better able to handle troubles which come up.