Most donations are quick and uneventful, but it is normal to have questions about how you might feel. Knowing what is common and mild versus what needs medical advice can help donors feel calm and prepared.

During the donation

Mild needle discomfort

·       You may feel a quick sting when the needle goes in.

·       After that, most donors feel little or no pain; if you do feel sharp or ongoing pain, tell staff immediately so they can check the needle position.

Light‑headedness or anxiety

·       Some donors feel nervous, sweaty, or slightly dizzy, especially first‑timers.

·       Focusing on slow breathing, looking away from the needle, or chatting with staff can help.

·       If you feel unwell, report it at once; staff can adjust your position, give you fluids, or pause the donation.

Immediately after donation

Mild dizziness or tiredness

·       You might feel a bit tired or light‑headed when you first stand up.

·       That is why you are asked to rest for 10–15 minutes, have a drink and snack.

·       Most people feel normal again before they leave.

Bruising at the needle site

·       A small bruise or some tenderness where the needle went in is relatively common.

·       It usually appears as a blue or purple patch and fades over a few days.

·       Keeping the bandage on, avoiding heavy lifting with that arm, and applying a cold pack (wrapped in cloth) for short periods can help.

Later the same day

Mild tiredness

·       Many donors go back to routine activities, but a few feel slightly more tired.

·       Drink extra fluids, avoid intense workouts, and get good sleep that night.

Small bump or lump

·       Sometimes a small, firm area (a hematoma) may form under the skin due to a bit of bleeding in the tissue.

·       This is usually harmless and improves over time.

·       If it is large, painful, hot, or spreading, you should contact the blood center or see a doctor.

When to seek help

While serious reactions are rare, donors should be aware of warning signs:

·       Fainting or collapse after leaving the centre.

·       Persistent or severe bleeding from the needle site that does not stop with pressure.

·       Very large or painful swelling in the arm.

·       Chest pain, shortness of breath, or severe headache.

·       Fever or signs of infection around the needle site (redness, warmth, pus).

If any of these occur:

·       Contact the blood centre using the number they gave you.

·       Or visit the nearest hospital or emergency department.

Reassurance for donors

For the vast majority of donors:

·       Any side effects are mild and short‑lived.

·       Proper preparation, following staff instructions, and good aftercare reduce the risk of problems.

·       If something does go wrong, trained staff are there to help you.