What should be done if a child has high platelet count?

Patient's question:

My friend's child has been feeling unwell recently. They went to the hospital for a blood test and found that their platelet count was high at 500. I don't know what the reason could be, and I'm very worried. I'd like to ask what should be done in this situation?

Doctor's answer:

The normal value of platelets is 100~300. The baby has high platelet count, which is mostly reactive thrombocytosis and is commonly seen in acute and chronic inflammation, iron deficiency anemia, etc. This type of increase generally does not exceed 500, and the platelet count will return to normal levels quickly after treatment. It is recommended to identify the cause and type of anemia. If it is iron deficiency anemia (microcytic hypochromic anemia), the mild increase in platelet count is likely related to the enhanced hematopoietic function of the bone marrow caused by iron deficiency anemia. As long as the anemia is treated and corrected, the platelet count will also return to normal. It is necessary to visit the hospital for timely examination and treatment for each cold or illness, allowing the doctor to directly examine and confirm the diagnosis, which is safer.

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