Short answer · Medically reviewed summary · Last updated: 2026-05-08

Essential Thrombocythemia is diagnosed through a combination of blood tests, bone marrow biopsies, and genetic screening to detect specific mutations like JAK2, CALR, or MPL. Because symptoms can be subtle or mimic other conditions, you should consult a hematologist if you experience persistent, unexplained high platelet counts or unusual clotting and bleeding events. What are the early signs of Essential Thrombocythemia? Many individuals with Essential Thrombocythemia are asymptomatic at diagnosis and are only identified through routine blood work showing an elevated platelet count (thrombocytosis).

2 people with Essential Thrombocythemia have shared their first-person experience on this question at DiseaseMaps.

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How do I know if I have Essential Thrombocythemia?

Could you have Essential Thrombocythemia? Early signs that prompted real patients to seek diagnosis, plus medically reviewed guidance.

Do I have Essential Thrombocythemia?

Essential Thrombocythemia is diagnosed through a combination of blood tests, bone marrow biopsies, and genetic screening to detect specific mutations like JAK2, CALR, or MPL. Because symptoms can be subtle or mimic other conditions, you should consult a hematologist if you experience persistent, unexplained high platelet counts or unusual clotting and bleeding events.



What are the early signs of Essential Thrombocythemia?


Many individuals with Essential Thrombocythemia are asymptomatic at diagnosis and are only identified through routine blood work showing an elevated platelet count (thrombocytosis). However, some people experience fatigue, unexplained weight loss, or bone pain. Other common indicators include vasomotor symptoms such as blurry vision, headaches, dizziness, or tingling in the hands and feet. Because these signs are non-specific, it is important to track any patterns in your health that persist over several weeks.



When should I see a doctor and what tests are required?


If your primary care physician notes a consistently high platelet count, you should request a referral to a hematologist. A hematologist specializing in Essential Thrombocythemia will typically order the following:



  • Complete Blood Count (CBC): To measure the total number of platelets in your blood.

  • Genetic Testing: Specifically screening for JAK2, CALR, or MPL gene mutations.

  • Bone Marrow Biopsy: To examine the bone marrow structure and rule out other blood disorders.

  • Blood Smear: To look at the size and shape of your blood cells under a microscope.



What are the red flags requiring urgent care?


While Essential Thrombocythemia is a chronic condition, certain symptoms indicate an increased risk of thrombosis (clotting) or hemorrhage. Seek immediate medical attention if you experience sudden chest pain, shortness of breath, severe weakness on one side of the body, slurred speech, or unexplained, severe bruising and bleeding that does not stop.



How can I advocate for myself?


If you feel your concerns about Essential Thrombocythemia are being dismissed, bring a log of your symptoms and recent blood test results to your appointment. Ask your doctor directly: "Could this be a myeloproliferative neoplasm, and should I see a hematologist for further evaluation?" Connecting with others can also provide support; currently, 325 people with Essential Thrombocythemia have joined the DiseaseMaps.org community to share their experiences.



Next steps



  • Consult a board-certified hematologist to interpret your blood work.

  • Keep a detailed symptom journal to share with your medical team.

  • Join the Essential Thrombocythemia community at DiseaseMaps.org to learn from others’ experiences.

  • Discuss current treatment options, such as aspirin or Hydrea, if a diagnosis is confirmed.



Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician regarding a medical condition.



References



  • NIH Genetic and Rare Diseases Information Center (GARD): Essential Thrombocythemia.

  • Orphanet: Essential Thrombocythemia (ORPHA:3335).

  • OMIM (Online Mendelian Inheritance in Man): Essential Thrombocythemia entries.

  • MPN Research Foundation: Patient resources for Essential Thrombocythemia.

Author: DiseaseMaps Editorial Team
Reviewed against authoritative medical sources (NIH GARD, Orphanet, OMIM)
Last updated: 2026-05-08
Medical disclaimer: This information does not substitute professional medical advice. Always consult your doctor before making health decisions.
Source: DiseaseMaps.org
3 answers
Many ET patients are asymptomatic. Consequently, the disease is often diagnosed as part of a routine check-up, after a blood test reveals a high platelet count. When symptoms are present, they may include fatigue, or may be related to small or large vessel disturbance or bleeding.

Common ET Symptoms related to small vessel disturbances may include:

Headache
Vision disturbances or silent migraines
Dizziness or lightheadedness
Coldness or blueness of fingers or toes
Burning, redness, and pain in the hands and feet
When bleeding is present as a symptom of essential thrombocythemia, it can manifest as:

Easy bruising, nosebleeds or heavy periods
Gastrointestinal bleeding or blood in the urine
Thrombotic complications can also occur, resulting in:

Stroke
Transient ischemic attack (TIA)
Heart attack
Deep vein thrombosis or pulmonary emblous (blood clot in the lung)
Blood clotting in unusual locations, such as the abdominal veins

Posted Aug 11, 2017 by Steve 2685
you need to see a doctor and a hematologist!
you will do some blood tests and a CT scan and finally a bone marrow biopsy to confirm!!!
if you are worried...GET CHECKED!!!

Posted Feb 7, 2019 by James 3550

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With a routine blood test my life changed. I had been having severe migraine headaches and I had never had even small headaches really so my Dr. made the decision to test my blood from that to a hematologist and more blood work I was diagnosed. My bl...
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In 2011 at the age of 42 I was diagnosed with Myeloproliferative Neoplasm (or MPN) and after a bone marrow biopsy, Essential Thrombocythemia (ET) was diagnosed. I am also JAK2+ I take a daily dosis of 1 500mg Hydrea which is an oral chemo and somet...
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Routine blood test to check on my iron counts as I also have thalassemia minor, showed platelets at 1mil. In the process of being diagnosed in 2006, had a heart attack (after having a colonoscopy.)I had a heart cath which showed blockage in 2 arterie...
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Last year (winter of 2015/2016) I had a virus and, at one stage, collapsed and was taken to hospital with a suspected heart attack/stroke. I had neither but my platelet level was elevated at over 600. However, the hospital ascribed to the virus and d...
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Was having trouble with health symptoms which affected my work ethic, a job I loved, so I asked my internist to either fix me or make it so I didn’t care! My symptoms were sudden confusion, dizzyness, a phantom feathery feeling and tingling in my ...

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