An increased platelet count, or thrombocythemia, can cause blood clots that travel to the brain, feet and hands, according to Healthline. The symptoms include numbness in the fingers and toes, dizziness, headache, heart attack and stroke. The patient also bleeds easily.
Primary or essential thrombocythemia is thrombocythemia that is not a complication of another disease, says Healthline. Secondary thrombocythemia is a complication of another condition. Thrombocythemia can also be inherited, but this is unusual. Sometimes there are no symptoms, and the condition isn't diagnosed until the patient undergoes tests and a physical examination.
Treatment of thrombocythemia depends on several factors, including the patient's age and medical history, says Healthline. Sometimes the doctor simply monitors the patient, prescribes an aspirin regimen or removes the extra platelets from the blood through platelet pheresis.