Why is there shortness of breath in spring?

If you are a middle school student, I personally think you may be under too much pressure. Last year, I used my skills that I have been practicing for many years to officially beat the boss named "College Entrance Examination" and exchanged my points for a college admission notice. I tried your situation, too. From a psychological point of view, it seems to be called psychological depression, that is, living in depressed emotions for a long time, leading to a decrease in systolic blood pressure and insufficient oxygen supply to the brain. So there is a feeling of poor breathing, especially in spring. In winter, the air that was originally dry immediately became very humid and felt like water absorption. Coupled with the fog in spring, the mood is more depressed, so many people commit suicide in spring. . . Don't learn from them, life is still beautiful, and deep breathing can relieve stress ~ but your breathing difficulties may also be affected by other reasons, such as sleeping at your desk, or there are factories polluting the air nearby. At this time of year, the wind just blows the waste gas to the school. If there is a large forest nearby, it may be that trees only breathe at night, which reduces the oxygen content around them and increases carbon dioxide. The above is my inference, I hope it will help you.