I often feel chest tightness and shortness of breath these two days, and I have been in the company for a long time, that's all. It's much better to get some air outdoors, and it's the same at home.

The vital capacity is not good, the storage of oxygen is relatively low, and it is easy to feel chest tightness and dizziness in places lacking oxygen. Insufficient oxygen will affect blood circulation into the brain. It is suggested that LZ do sports in his spare time, such as cycling, swimming and running, to increase his vital capacity and increase the motivation of his blood circulation system.

It has nothing to do with the stomach. You should eat well and sleep well, and don't always sit still. You can't eat if your stomach is upset.