Why does the throat feel sweet when vomiting blood in martial arts novels?

Like the question, was it because of the sweetness of blood? But I heard that blood is salty when I was young!

Answer 1

In martial arts novels, when one vomited blood, their throat would be sweet for the following reasons:

During vomiting, blood will take away a lot of oxygen, causing the oxygen content in the blood to decrease. When the oxygen content in the blood is too low, people will feel a sweet taste in their throats. This is because hypoxemias will cause the saliva glands in the throat to secrete sweet substances.

In wuxia novels, the scene of vomiting blood usually depicted blood spurting out from the mouth and nose. The blood in this scene was usually bright red, and bright red blood contained higher blood sugar and sugar. Therefore, the reason why the throat felt sweet after vomiting blood might be because blood sugar and sugar also had a sweet taste.

The scene of vomiting blood in martial arts novels was also often associated with the performance of profound internal energy. In this case, vomiting blood may be caused by some unhealthy state in the human body. In this case, the sugar and oxygen content in the blood may be relatively low, so the throat will feel sweet.