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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Felt Dizzy After Donating Blood. Severe Cramps In Legs. Is It Related?

Hi there! The last time I gave blood , despite being very well hydrated, I felt dizzy when I got home. That night, I awoke for hours on end with absolutely horrible leg cramps . The cramps were up and down both legs, including feet . Do you suppose that was related to my blood donation? I really enjoy being able to give blood. If you think it was related, is there something I can do to keep that from happening? Thanks!
posted on Thu, 14 Mar 2013
Twitter Mon, 5 Aug 2013 Answered on
Twitter Tue, 6 Aug 2013 Last reviewed on
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General & Family Physician,  's  Response
Hello,
Normally nothing much happens after blood donation but some people may feel tired or dizzy after the donation.There is nothing much to worry about.
You are asked not to do any strenuous activity or lifting of weight for 12 hours after the blood donation.
Take plenty of water and juices to keep yourself hydrated well.
Your body replaces all the fluids donated within 48 hours and all your red cells are replaced within 4-8 weeks.
You might have done some strenuous activity after the donation which might have caused these leg cramps.
Thanks
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Felt Dizzy After Donating Blood. Severe Cramps In Legs. Is It Related?

Hello, Normally nothing much happens after blood donation but some people may feel tired or dizzy after the donation.There is nothing much to worry about. You are asked not to do any strenuous activity or lifting of weight for 12 hours after the blood donation. Take plenty of water and juices to keep yourself hydrated well. Your body replaces all the fluids donated within 48 hours and all your red cells are replaced within 4-8 weeks. You might have done some strenuous activity after the donation which might have caused these leg cramps. Thanks