Is fainting a physical problem or a psychological problem?

In fact, blood disease is not a psychological problem, nor a physical problem, because both psychological and physical problems will lead to blood disease.

I remember donating blood for the first time as an adult, because the first time I said I would donate 200 yuan, and the little nurse said it was still 400 yuan. I couldn't resist the temptation of beauty, so I donated 400 yuan I didn't know about my first attempt to donate blood. I eat normally in the morning, and I am nervous when the blood donation station gives me a bottle of drink. When the blood needle stuck in my arm, I told the nurse that I was a little dizzy, and he said nothing.

The second blood donation is much better. I didn't feel anything when I took the blood test, probably because I didn't eat in the morning and felt a little dizzy after donating blood.

And the third, fourth and fifth time, I didn't feel anything.

I think I should be mentally ill. I'm a little nervous about donating blood for the first time.

However, it is a bit daunting to see a lot of blood at ordinary times, but it is difficult to see a lot of blood at ordinary times, so I feel good.

In fact, for many people, blood disease is psychological, perhaps nervous, perhaps because of meeting for the first time or something. This habit is good at ordinary times. Some people even vomit, and for many people, blood diseases may be physiological, but physiological blood diseases may be related to the taste and red color of blood. I've never seen a friend with a similar blood disease, only those who get blood disease by drawing blood.

But most of the causes of blood diseases should be physiological. My mother's blood disease, although she had killed chickens and bled before, didn't feel dizzy at that time, but she felt a little dizzy after blood drawing, so it must be physiological.