Maybe I have pressure in my heart. These pressures may come from the outside or from my heart. Externally, there may be a lot of pressure to study. Internally, it may be because there is no sense of security, so many people will be afraid, and the air there is not circulating, which will make people feel flustered. Every time I go to the supermarket or shopping mall, I have a similar phenomenon. Just don't think too much. Learn to relax and enjoy life.