Platelet levels are considered dangerous when they are very low, because the main risk is bleeding. Platelets are essential for the blood clotting process, and when their number drops too much, clotting becomes impaired and the risk of bleeding increases.
Although uncommon, bleeding can sometimes occur without any apparent cause when platelet counts reach critically low levels. This is more likely when platelets fall below 150,000 per µL of blood, which is generally the threshold considered dangerous.
The risk of bleeding is also higher in people who have:
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A history of blood clotting disorders
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Inflammation, infection, or fever
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Anatomical abnormalities or surgical scars
When platelet levels decrease significantly, it is important to see a hematologist, the medical specialist who can evaluate blood-related conditions and recommend the most appropriate treatment. This helps prevent serious complications, such as spontaneous bleeding.
In many cases, a platelet transfusion may be necessary to quickly raise platelet levels and reduce the immediate risk of bleeding. However, it is also essential to investigate and treat the underlying cause of the low platelet count to prevent the problem from recurring.