Hello, according to the situation described, more consideration should be given to the excessive pressure of study and mental stress, which leads to the habit of daydreaming and personal interest in mathematics. Therefore, when encountering some problems, habitual research and thinking will easily lead to brain fatigue.

Suggestion:

It is best not to go to a dead end, let nature take its course, simply look at the problem, don't deliberately take detours, take a proper rest, avoid excessive use of your brain for a long time, which may easily lead to anxiety, and relax yourself properly at ordinary times.