Platelet Count
Platelets are small blood-clotting cell fragments produced by the bone marrow. They aggregate at sites of injury to stop bleeding. Both too few (thrombocytopenia) and too many (thrombocytosis) cause problems — bleeding or clotting respectively.
Normal Range
150–400 × 10⁹/L
Reference ranges may vary slightly between laboratories. Always interpret your result in context with your doctor.
Why is Platelets measured?
Platelets are part of every CBC. They are tested to evaluate bleeding or bruising, before surgery or invasive procedures, in pregnancy, and to monitor people on blood thinners or chemotherapy.
High Platelets means…
High platelets can be reactive (after surgery, infection, iron deficiency, splenectomy) or primary (essential thrombocythaemia, polycythaemia vera). Very high platelets (>1,000 × 10⁹/L) increase clotting risk.
Low Platelets means…
Low platelets increase bleeding risk. Mild reduction (100–150) is rarely symptomatic. Below 50 raises bleeding risk; below 20 is significant; below 10 is an emergency.
Symptoms associated with abnormal Platelets
When Platelets is high:
- Often asymptomatic
- Headache, blurred vision
- Numbness in extremities
- Blood clots in legs or lungs
When Platelets is low:
- Easy bruising
- Petechiae (tiny red dots) on skin
- Bleeding gums or nosebleeds
- Heavy menstrual periods
- Blood in urine or stools
How to improve your Platelets
- Avoid aspirin and NSAIDs if your platelet count is low — they impair the platelets you have.
- Persistent unexplained low platelets warrant investigation; ITP and bone marrow conditions need treatment.
- If platelets are high, address the underlying cause; aspirin may be recommended in essential thrombocythaemia.
Frequently asked questions about Platelets
When are low platelets dangerous?
Below 50 × 10⁹/L raises bleeding risk during surgery or trauma. Below 20 increases spontaneous bleeding risk. Below 10 is an emergency requiring platelet transfusion in many cases.
Can dengue cause low platelets?
Yes — dengue is a leading cause of acute thrombocytopenia in tropical regions. Platelets typically nadir 4–7 days after symptom onset and recover with hydration and supportive care.
Medical Sources
This page is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider about your individual results.