# What are platelets and what is their main function in the body? Canonical page: https://clinicsjo.com/en/faq/ma-hi-al-safaeh-al-damawiya-wama-wadifatuha-al-raeesiya-fi-al-jism Language: en Category: general Publisher: ClinicsJo Published: 2026-09-13T08:09:52.640Z Content updated: 2026-09-13T08:09:52.640Z Translation (ar): https://clinicsjo.com/ar/faq/ma-hi-al-safaeh-al-damawiya-wama-wadifatuha-al-raeesiya-fi-al-jism Platelets, also known as thrombocytes, are small cell fragments formed in the bone marrow, which is the spongy tissue inside bones [\[1\]](). Platelets are a vital component of blood and play a pivotal role in the blood clotting process and stopping bleeding. ## The Main Function of Platelets The primary function of platelets is to help stop bleeding when a blood vessel is injured. When a blood vessel sustains a wound, platelets aggregate to form a plug (clot) that seals the opening in the injured vessel, thereby stopping the bleeding [\[1\]](). This process is essential for maintaining the body's integrity and preventing excessive blood loss. ## Platelet Disorders and Their Impact Various problems related to platelets can occur, affecting the body's ability to control bleeding or clotting. These disorders include: - **Thrombocytopenia:** Occurs when the number of platelets in the blood is too low. This can increase the risk of bleeding, which may be mild or severe, internal or external [\[1\]](). In some cases, mild deficiency may not require treatment, while more serious cases may require medication, blood transfusions, or platelet transfusions [\[1\]](). - **Thrombocythemia/Thrombocytosis:** Occurs when there is an excessively high number of platelets in the blood, which may increase the risk of blood clots [\[1\]](). If the cause is unknown, it is called "essential thrombocythemia," a rare condition that may not require treatment if no symptoms appear [\[1\]](). If the increase is caused by another disease or condition, it is known as "secondary thrombocytosis," and treatment and prognosis depend on the underlying cause [\[1\]](). - **Platelet Dysfunction:** In some cases, platelets may not function correctly even if their count is normal. For example, in von Willebrand Disease, platelets cannot adhere to each other or to blood vessel walls, causing excessive bleeding [\[1\]](). Treatment depends on the type of the disease. ## The Importance of Examination and Diagnosis A Complete Blood Count (CBC) is a common test that measures platelet levels, in addition to red and white blood cells [\[3\]](). Abnormal platelet levels can indicate a clotting or bleeding disorder [\[3\]](). If there are suspicions of a platelet disorder, the doctor may recommend additional tests, such as blood clotting tests or bone marrow tests, to determine the exact cause [\[3\]](). ## When Should You Consult a Doctor? If you experience symptoms such as easy bruising, unexplained bleeding (such as frequent nosebleeds or gum bleeding), or the appearance of small red spots under the skin (petechiae), this may be an indicator of a platelet disorder [\[1\]](). It is important to consult a doctor to evaluate the symptoms and perform the necessary tests to diagnose the condition and determine appropriate treatment. Some platelet disorders can be serious and require immediate medical attention, especially if associated with severe bleeding or life-threatening blood clots. For more information on platelet disorders, causes of bleeding or excessive clotting, and treatment, you can visit [Platelet Disorders: Causes of Bleeding or Excessive Clotting and How to Treat Them (Arabic)](). ## Medical references - [Platelet Disorders]() - [Blood Tests Blood Tests]() General health education; not a substitute for individualized clinical assessment. Citation URL: https://clinicsjo.com/en/faq/ma-hi-al-safaeh-al-damawiya-wama-wadifatuha-al-raeesiya-fi-al-jism#answer