Often I experience extreme tiredness or stomach aches when I need to work on a project that I don't want to work on. Sometimes just walking into the same floor where work is waiting causes those symptoms.
I rationally understand what must be done, but it's like my emotional body disagrees with my reason. I am confident that it is mostly psychosomatic and not actually some sort of disease, because if I switch to a more enjoyable project, often the symptoms go away.
How can I convince part of my mind that is causing those symptoms? Are there any mental tricks?