The phenomenon of high platelets in newborns requires finding the specific cause first and carrying out targeted treatment to avoid irreparable consequences. Common causes 1, dehydration: newborns due to insufficient intake of breast milk caused by the lack of body fluids, which leads to dehydration, the phenomenon of increased platelets; 2, neonatal infections: upper respiratory tract infections, such as cough, fever, abdominal pain or neonatal pneumonia, neonatal umbilicus, neonatal sepsis, etc., due to the release of toxins from infected bacteria, thus stimulating bone marrow proliferation, resulting in significantly higher platelets; 3, immune diseases: suffering from Autoimmune diseases such as Kawasaki disease, cutaneous mucosal lymph node syndrome, etc. can cause high platelets; 4, myeloproliferative diseases: also seen in primary thrombocytosis, which is a myeloproliferative disease, often with genetic mutations in the body, such as chronic granulocytic leukemia, true erythrocytosis, primary thrombocytosis, early myelofibrosis, etc., prone to high platelets; 5, anemia. More severe anemia, such as hemorrhagic anemia or neonatal hemolysis, which are common in the neonatal period, can lead to anemia. Hemoglobin decreases, the bone marrow will feedback proliferate, which causes a significant increase in platelet production, resulting in high platelets; 6, other: vitamin deficiency or micronutrient deficiency can also cause high platelets in newborns. Consequences If platelets are high, newborns will have symptoms such as restless sleep and crying at night, also accompanied by symptoms of bleeding from the mucous membranes of the oral and nasal cavities. Severe cases are also prone to thrombotic diseases, such as cerebral infarction, infarction of the heart, as well as pulmonary embolism and deep vein thrombosis of the lower limbs.