An increased platelet count is when the number of platelets in the peripheral blood exceeds the normal range. In clinical practice, many inflammatory conditions can cause an increase in platelet count, a condition also known as platelet-reactive elevation. There are two types of inflammatory conditions that cause increased platelet counts. One is infectious inflammation, which is commonly associated with various bacterial infections, such as acute appendicitis, acute tonsillitis, and so on. When these bacterial infections occur, they stimulate the release of excessive platelets from the bone marrow in the human body, and an increased platelet count occurs. Bacterial infections are the most common cause of increased platelets in infectious inflammation. Another type of sterile inflammation, such as severe trauma, major surgery, serious trauma, etc., can cause a reactive increase in platelet count, and sometimes the platelet count can reach an abnormally high level. Both infectious and aseptic inflammation can cause an increase in platelet count.