What are the potential aftereffects of donating 400 milliliters of blood during menstruation?

Patient's question:

Please ask: If I donate 400 milliliters of blood during my menstrual period, what kind of aftereffects might I experience?
First follow-up question: Why do I still feel pain at the needle puncture site?
It was donated yesterday, and it has already been a day.
Second follow-up question: I've been feeling dizzy and stuffy all day now. When will this condition improve?

Doctor's answer:

??????Your situation is like this, you just donated 400 milliliters of blood in the morning, and then you had your period at noon. There is no problem, but it is best for you to rest and eat more nutritious foods for now, such as chicken soup, eggs, brown sugar water, meat, dairy products, and fruits. If you feel dizzy, you can take some Ejiao Jiang orally.
It is recommended that you rest, eat more high-protein and high-vitamin foods, and take Ejiao Jiang orally if necessary.

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