At some moment you will get to a point in your career that you will feel bored or irritable by your work situation. This could be because you have outgrown your current position, or you feel you aren't being challenged. Maybe you feel that it's time for you to take up some more responsibility because you have mastered all the aspects of your current job. Whatever the reason may be, you will have to make a decision and then you will have to take action.
Decision without action is just a wish. You will have to decide if you want to stay in your current company and work for a promotion, or leave the company completely, or change industries, or change career paths. Making that decision in itself is going to be uncomfortable because your brain is now starting to realize that you are trying to step outside of your comfort zone so it will do everything it can to prevent that. Why? Because your brain is wired to keep you safe and anything outside your comfort zone is not safe. Serious introspection needs to take place and then you will know what you need to do.
The whole process can be overwhelming and scary, but don't give up. Change is good. You will look back at your previous self and thank them for being brave.