Blood donation FAQs
Answers to common questions about giving blood, including how long it takes, blood types, eligibility, donation frequency and what happens afterwards.
How much blood is taken when you donate?
A standard whole-blood donation is approximately 470 ml. The exact process can vary depending on the type of donation.
How long does giving blood take?
The donation itself is relatively quick, but the complete appointment takes longer because it includes registration, health checks, donation and recovery.
Does giving blood hurt?
Most donors experience a brief needle prick when the needle is inserted. The donation team will explain the process and help you throughout the appointment.
What happens to my blood after I donate?
Donated blood is tested and processed before being made available for clinical use. Whole blood can be separated into red blood cells, platelets and plasma.
Can I donate if I take medication?
Possibly. Medication does not necessarily prevent blood donation. Eligibility depends on the medication, the reason for taking it and your circumstances.
Can I donate if I have a tattoo?
Possibly, but some tattoos and related procedures can mean you need to wait before donating. Check the current eligibility rules.
Can I donate after travelling abroad?
Travel can affect eligibility because some destinations carry infection risks. Check current travel guidance before booking.
Can I donate if I don't know my blood type?
Yes. You do not need to know your blood type before becoming a donor.
How often can I donate?
Donation frequency depends on the blood service, type of donation and your circumstances.
Read about donation frequency →
Where can I donate?
Use our session finder to see upcoming opportunities.
Find a blood donation session →
Where can I see blood-stock information?
Is BloodDonor.uk an NHS website?
No. BloodDonor.uk is an independent information resource. It is not an NHS website and does not replace advice or eligibility decisions made by the official blood services.