Hives (urticaria) and blood donation

Not right now, but most waits are short. Wait until the hives have fully settled. Active, widespread hives defer donation, mostly for your comfort and safety that day. ## The short answer Active allergic reactions mean your body is reacting right now; centres prefer you fully settled before you donate. Once the rash and itching are gone and any antihistamine course is finished, you can donate as normal. Long-quiet, occasional mild hives are case-by-case, ask. ## The usual wait Commonly until fully settled and any treatment is complete, often just days. Nobody is turned away forever for most of these, the register will still be here when the wait ends. ## At the screening desk Tell the staff: Say when the hives started, what triggered them if known, and what you took. That conversation is confidential and takes a minute, it exists so the medical officer can clear you safely on the day. Everyone meets the same basics: age 18,65, weight 50 kg+, haemoglobin on target, feeling well today. Men donate every 3 months, women every 4, the rest rules, simply. Not sure about your case? Try the Can I donate? checker or read who can donate and the deferral list in plain words. Still weighing it? Is blood donation safe? and the honest side-effects list are straight answers, not brochure talk. ## The one line that matters The medical officer at the centre makes the final call on the day, with your name, your file and your actual reading in front of them. Use this page to walk in informed, not to overrule anyone.