Following a blood donation, following a few common-sense precautions helps prevent complications and speeds recovery. Most advice applies for the first 24–48 hours.
Avoid heavy exercise and strenuous work
High-intensity exercise, heavy lifting, and contact sports can increase the risk of bruising or bleeding at the needle site and worsen dizziness. Wait at least 24 hours before returning to strenuous activity.
Avoid alcohol and excessive caffeine
Alcohol can contribute to dehydration and impair recovery; avoid drinking alcohol for at least 24 hours. Also be mindful that caffeine can have dehydrating effects — drink water alongside caffeinated beverages.
Avoid smoking immediately after donation
Smoking may affect circulation and recovery; if possible avoid smoking for a few hours and try to remain hydrated.
Avoid long, hot baths or saunas
High heat can lower blood pressure and increase dizziness; choose a cool shower instead if you feel lightheaded.
Avoid driving if faint or dizzy
If you feel faint, lie down and raise your legs until symptoms pass. Do not drive until you feel fully alert.
When to seek help
Contact your donation centre or healthcare provider if you experience heavy bleeding from the site, a large painful bruise, persistent dizziness, chest pain or breathlessness.