Poor performance in maths can lead to maths anxiety, but there are also studies that point in the other direction. If you have maths anxiety, it disrupts your concentration. Even students who score high on maths tests can feel a special worry around this subject
There has been some overlap demonstrated between maths anxiety and other general types of anxiety, especially related to test-taking, but maths anxiety seems to exist as a separate phenomenon. Studies have shown increased heart rates when people were tested on maths, but not on other subjects. One problem is that we tend to believe with maths that you either have the ability or you don’t, rather than assuming that your skills and abilities are the result of study and practice.