Platelets (Thrombocytes) – Blood Clotting and Bleeding Risk
Platelets, also known as thrombocytes, are small cell fragments produced in the bone marrow. They circulate in the blood and aggregate at sites of blood vessel damage to form clots and stop bleeding. A platelet count is part of every complete blood count and is essential for evaluating clotting function, bleeding risk, and bone marrow health.
Why Test Platelets?
Platelet testing is recommended to check clotting ability if you bruise or bleed easily, investigate signs of blood clots, evaluate inflammation or bone marrow function, and monitor treatment with medications affecting the immune system or bone marrow.
What Do High Platelets Levels Mean?
Elevated platelets (thrombocytosis) may be caused by inflammation, infection, iron deficiency, or blood disorders such as essential thrombocythemia. A temporary increase can occur after surgery or blood loss. Persistently high levels may increase the risk of blood clots.
What Do Low Platelets Levels Mean?
Low platelets (thrombocytopenia) are often seen with viral infections, autoimmune diseases (e.g., ITP), bone marrow disorders, or B12/folic acid deficiency. Low values can increase the risk of easy bruising, nosebleeds, and prolonged bleeding.
Symptoms to Watch For
- Easy bruising
- Frequent nosebleeds
- Bleeding gums
- Heavy menstrual periods
- Prolonged bleeding from cuts
- Small red or purple spots on the skin (petechiae)
Who Should Get Tested?
- People who bruise or bleed easily
- Those with frequent nosebleeds or bleeding gums
- Women with unusually heavy periods
- Patients with symptoms of blood clots
- Anyone on medications that affect blood or immune function
How to Prepare for Your Test
No special preparation is needed. Bring valid ID to your appointment.
Order Your Blood Test
Test your Platelets levels with an accredited Swedish laboratory. Results within days, reviewed by Wellth.
Frequently Asked Questions
What is a normal platelet count?
Can platelets be too high?
What causes sudden drops in platelets?
Reviewed by
Wellth Team
Wellth
Our content is written and reviewed by Wellth, and fact-checked against peer-reviewed research and current Swedish clinical guidelines.
Learn more about our team →Medical Disclaimer
The information on this page is provided for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment. Wellth provides health information and testing services but is not a substitute for clinical care. Always consult a qualified healthcare provider if you have questions about a medical condition. If you are experiencing severe or urgent symptoms, contact your doctor or call 1177 Vårdguiden. Blood test results should be interpreted by a qualified healthcare professional in the context of your complete medical history.