Platelets or thrombocytes are cells that help the blood to clot and stop bleeding. When there is damage to the blood vessel platelets gather at the damaged site, attach to certain substances and secrete chemical messengers. Then they stick together to form a temporary seal to cover the break in the blood vessel wall.

Thrombocytopenia is low platelet count and thrombocytosis is elevated platelet count. Normal range of platelet count in a healthy individual is 1.5 to 4 lakhs/ cubic mm of blood. An extremely low level of platelets in the body may be seen in dengue, bone malfunction, cancer chemotherapy, etc. Platelet count is especially important to determine if you might be suffering from malaria or dengue. When infected with dengue virus, our body’s capacity to produce new platelets is affected. Platelet count starts decreasing below normal. An extremely low level of platelets in the body could lead to haemorrhaging and bleeding into the brain. High platelet levels are seen in infections, blood and bone marrow disorders, splenectomy, cancer, etc.

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