Health condition
Platelet function disorders
Platelet function disorders are conditions in which platelet numbers are normal but the platelets do not work properly, causing easy bruising and mucosal bleeding; they are underdiagnosed because routine blood tests look normal.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
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A normal platelet count does not exclude a platelet problem
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Typical features: bruising, nosebleeds, heavy periods, bleeding after surgery or dental work
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Diagnosis needs specialised aggregation testing at a haemostasis laboratory
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Management combines avoidance of antiplatelet drugs, tranexamic acid and peri-operative planning
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
Platelets can fail in many quiet ways - defective receptors, empty storage granules, faulty release mechanisms - producing a lifelong pattern of mucocutaneous bleeding that standard tests miss entirely. Many affected people have normalised their symptoms for decades, only coming to attention after excessive surgical bleeding or when a relative is diagnosed. Aspirin and ibuprofen visibly worsen the picture.
Diagnosis and treatment routes
The diagnostic pathway runs through light transmission aggregometry and granule-release testing, ideally before any procedure that could provoke bleeding, with genetic panels increasingly clarifying specific defects. Management is pragmatic: tranexamic acid for mucosal bleeding and periods, avoiding antiplatelet medicines, dental and surgical plans agreed in advance, and platelet transfusion or other agents held in reserve for major bleeding. In many parts of the UK, routine NHS referrals for this kind of problem can take months, whereas an initial appointment with a private consultant is typically available within around two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant haematologist. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Platelet function disorders.
Quick, plain-English answers to what people ask us most.
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What are platelet function disorders?
Platelet function disorders are conditions where platelets, the blood cells responsible for clotting, don't work properly even though their numbers may be normal, leading to easy bruising and bleeding tendencies.
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What causes platelet function disorders?
Some are inherited genetic conditions affecting how platelets stick together or release clotting factors, while others are acquired, caused by certain medications (such as aspirin), kidney disease, or other underlying medical conditions.
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What are the symptoms?
Easy bruising, nosebleeds, heavy periods, prolonged bleeding from minor cuts, and bleeding gums are common symptoms, varying in severity depending on the specific disorder and its cause.
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Are platelet function disorders dangerous?
Most are mild and cause manageable symptoms, but more severe inherited forms, or acquired disorders combined with surgery or injury, can lead to significant bleeding that needs careful management.
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Are platelet function disorders hereditary?
Some are, such as certain inherited platelet disorders passed down in families, while others are acquired later in life due to medications or other medical conditions, unrelated to genetics.
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Can platelet function disorders be treated?
Treatment depends on the cause and severity, ranging from avoiding medications that worsen platelet function, to specific treatments to boost platelet function or provide platelet transfusions before surgery or in significant bleeding.
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How are platelet function disorders diagnosed?
Specialised blood tests assessing how well platelets aggregate and function, alongside a detailed personal and family bleeding history, help diagnose these disorders, sometimes requiring referral to a haematologist.
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How is bleeding managed for someone with a platelet function disorder?
Management includes avoiding medications that further impair platelet function, using specific treatments to support clotting before planned procedures, and having a clear management plan in place for any surgery or significant injury.
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Platelet function disorders vs low platelet count — what's the difference?
A low platelet count (thrombocytopenia) means there aren't enough platelets, while platelet function disorders mean the platelet count may be normal but the platelets themselves don't work properly; both can cause similar bleeding symptoms but need different specific tests to diagnose.
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When should I see a specialist, and how quickly can I be seen privately?
See a haematologist if you have unexplained or excessive bruising and bleeding. Private specialist assessment is typically available within about two weeks, considerably faster than standard NHS haematology referral waiting times.