The reason why it hurts when you breathe is as follows: 1, caused by acid reflux, acid reflux is caused by the acidic liquid in the stomach and intestines, which for some reason keeps flowing backwards into the esophagus, so there will be obvious stomach pain; 2, it may be caused by overeating, if there is a lot of food piled up in the stomach and it has not been absorbed and digested, there will also be obvious pain when you breathe deeply. The pain can be felt even when lying down. Therefore, in this kind of situation, should pay attention to the intake of food after the appropriate gentle exercise, can effectively avoid stomach pain, but also should not choose strenuous exercise. Even if you choose to lie down, you should raise your head appropriately by 10-15 cm to be able to achieve the effect of relieving pain.