Your body treats surgery as a construction project, resources, immune attention and time all get redirected to healing. Donating during that project means drawing from a builder mid-job. The deferral isn’t a punishment; it’s the schedule.
Major surgery, commonly months
For significant procedures (abdominal, orthopaedic, cardiac, anything under general anaesthesia with real recovery), the standard guidance is to wait until you are fully recovered and cleared by your doctor, commonly a matter of months depending on the procedure. There is no universal date: a laparoscopy and a knee replacement are different recoveries. Bring your surgical summary; the centre decides with you.
Minor procedures, shorter waits
Small excisions, biopsies, endoscopy-style procedures, typically shorter deferrals once healing is complete. Declare what was done; the centre’s list gives you the answer.
Dental work, from same-day to days
- Routine cleaning/check-up, usually fine the same day.
- Extraction or root canal, centres commonly ask for a wait of a few days.
- Implants/gum surgery, longer; ask the centre. The mouth heals fast, but it’s still a break in the body’s most bacteria-rich neighbourhood.
The three reasons behind the rule
- Healing, your protein and iron budgets are already committed.
- Infection, any healing wound is a doorway; transfused patients are vulnerable.
- Anaesthesia, recovery changes what’s comfortable and safe for you.
When you’re cleared
You come back exactly as you were, the deferral ends, the couch accepts you, and the register holds your slot. Register →
Explore
The full eligibility hub → · when sickness delays donation → · all deferrals →