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After your bone marrow biopsy

Bone Marrow Biopsy Complications: — What to Watch For

Most bone marrow biopsies go smoothly, and serious complications are uncommon. Knowing what is normal in the days after the procedure, and which symptoms need same-day attention, means you are not left guessing if something does not feel right.

Medically reviewed by Dr. Mohammed Imaduddin, Surgical Oncologist, MBBS · MS (General Surgery) · M.Ch (Surgical Oncology) · Last reviewed September 2026

  • Serious problems are uncommon — Major haematology guidelines consistently classify significant complications as rare.
  • Bruising and soreness are expected — They are part of normal healing, not a sign that something has gone wrong.
  • Infection and nerve effects are rare — Strict sterile technique at the site keeps infection risk low.
  • Early warning signs exist — Most complications give signals you can act on before they become serious.
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Serious complications after a bone marrow biopsy are uncommon. The most common problem is a bruise or small blood collection at the biopsy site, which usually resolves on its own. Infection and nerve effects are rare. ESMO and major haematology bodies classify this as a low-risk procedure when performed by experienced clinicians.

What should you expect in the hours and days after a bone marrow biopsy?

  1. First two hours

    Pressure is applied to the biopsy site and you rest in the day unit. The team checks for bleeding or unusual pain before you leave. Most people go home within this window.

  2. First 24 hours at home

    The site feels like a deep bruise. Keep the dressing dry and in place. Soreness when sitting or lying on that side is normal at this stage and is not a sign that something has gone wrong.

  3. Days two to five

    Soreness should ease steadily. A visible bruise spreading around the site is common. It does not mean internal bleeding — it is normal and clears with healing.

  4. When to act

    If pain increases rather than fades, the site swells noticeably, you develop a fever, or anything feels wrong, contact your haematology team the same day. Do not wait for your next appointment.

What can actually go wrong after a bone marrow biopsy?

The most common complication is a haematoma — a collection of blood under the skin at the biopsy site. Most are small and settle without treatment. They typically clear within one to two weeks.

Infection at the site is possible but uncommon. The procedure is carried out under strict sterile conditions. Signs of infection — redness that spreads outward, warmth, or a discharge — usually appear within the first few days.

Some people notice tingling, a shooting sensation, or a patch of numbness around the hip or upper leg. This reflects temporary nerve irritation from the biopsy. It almost always settles on its own.

How common are complications from a bone marrow biopsy?

ESMO and other major haematology guidelines consistently describe serious complications as uncommon. The procedure has been performed routinely in haematology for decades, and large case series report low complication rates.

Bruising and local soreness are expected, not complications. They are part of normal healing. When guidance describes the procedure as well-tolerated, this is the experience being described — predictable discomfort, not lasting harm.

Being told the risk is low is more useful when you also know what to watch for. Most complications that do occur give early warning signs and respond well when reported promptly.

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What do the terms on your discharge notes mean?

Haematoma
A localised collection of blood under the skin, forming a firm and sometimes tender lump. Most are small and resolve without treatment.
Posterior iliac crest
The back of the pelvic bone, just below the waistline. Almost all bone marrow biopsies are taken from this site.
Trephine core
The small cylinder of bone and marrow tissue removed during the biopsy. This is what the laboratory examines under a microscope.
Neuropraxia
Temporary disruption to a nerve's function, causing tingling, numbness, or a shooting sensation. It resolves on its own, usually within weeks.
Aseptic technique
The sterile process used to prepare the skin and instruments before the biopsy, which keeps the risk of infection low.

Which symptoms mean you should contact your team today?

  • Pain at the biopsy site that is getting worse, not better, after the first day or two
  • A lump or swelling at the site that is visibly growing
  • Skin around the site that is red, warm, or has any discharge
  • A fever at any level in the days after the procedure
  • New or worsening tingling, numbness, or weakness in the leg
  • Bleeding through the dressing that does not settle with firm pressure

What does your team do when a complication is found?

Minor haematomas and local soreness are observed and allowed to resolve. Your team will tell you what to watch for and when to follow up. Most settle within one to two weeks.

If infection is suspected, your haematologist is informed and a plan is made promptly. Nerve symptoms are assessed and, in most cases, you are given a recovery timeline of weeks rather than months.

Your biopsy results are reviewed by your treating haematologist on the expected schedule regardless of what happens at the skin surface. A local complication does not affect the sample the laboratory already received.

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Common questions

Frequently asked questions

Is bleeding after a bone marrow biopsy dangerous?

For most people, no. Some bleeding at the site is expected, and pressure applied at the time of the procedure controls it before you go home. Significant bleeding is rare and more likely in people with very low platelet counts — something your team checks before proceeding. If the site swells noticeably or bleeds after you are home, call your haematology team the same day rather than waiting.

Will I be in a lot of pain after the biopsy?

Most people describe the site as feeling like a deep bruise for one to three days. Soreness when pressing the area, or lying on that side, is normal and should ease day by day. If pain increases rather than fades after the first couple of days, that is worth reporting. Ask your team what pain relief is appropriate for you, as advice depends on your medications and blood counts.

Can I get an infection from a bone marrow biopsy?

Infection is possible but uncommon. Strict sterile technique during the procedure significantly reduces the risk. Signs usually appear within the first few days: skin that is red, warm, or has a discharge. A fever at any level after the biopsy is also a reason to call your team the same day, particularly if you are already immunocompromised from your underlying condition or treatment.

I have tingling and numbness in my leg after the biopsy. Is that normal?

It can be. The biopsy site is close to nerves that supply the leg, and the procedure can temporarily irritate one of them. Tingling, a shooting sensation, or a numb patch that differs from the bruise pattern is usually nerve irritation rather than a structural problem. It almost always resolves over days to weeks. Tell your team at your next contact. If it is worsening or you notice weakness in the leg, report it the same day.

How long does it take to feel normal after a bone marrow biopsy?

Most people feel largely comfortable within three to five days. The bruise may take one to two weeks to clear, and the site can stay tender when pressed for a little longer. Your team will advise when you can return to normal activity. If recovery feels slower than this, mention it at your next appointment rather than assuming it is still within the usual range.

Does a complication at the biopsy site affect my results?

Usually not. The bone marrow sample goes to the laboratory at the time of the biopsy and is processed independently of anything that happens at the skin surface afterwards. A haematoma or local infection does not affect the tissue the laboratory already has. Your haematologist receives the result on the expected timeline in almost all cases. If there is a reason for a delay, your team will let you know.

Full index

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