How to write an anemic character?

I've done some research, but I'm still unsure. Any tips?

Well if you haven't already, do medical research. If you can, try talking to someone who has the condition online or in real life. If you look up "What it's like to be anemic" or something along those lines something will probably come up. If you've already done these things then you should know enough to write a character with it. Hope this helps.

you are tired a lot. My mom was anemic. She described it by saying when she walked from her bed room to the kitchen it felt like she had run a marathon. The thought of doing anything is just too tiring, and when you actually complete the activity you need to sleep. There were many times where when she went to the doctors they were surprised she hadn't already passed out.

Thanks, I'll keep that in mind.