Platelets below 70 x 10^9 per L are classified as significantly reduced platelets and are at risk. The range of platelets in a normal person is 100-300×10^9 per L. With platelets below 70×10^9 per L, there is a risk of bleeding and the lower the platelet count, the greater the risk of bleeding for the patient and the greater the danger of bleeding occurring. Clinically, if the platelet count is below 30×10^9 cells/L, the patient may experience spontaneous bleeding, without any trauma, but also bleeding spots and petechiae on the skin, sometimes even bleeding from the nose and gums, and in severe cases, internal bleeding may occur, such as bleeding from the gastrointestinal tract, manifested as vomiting blood and black stools; and sometimes bleeding from the urinary tract, manifested as Hematuria in the naked eye. One of the most serious cases is cerebral hemorrhage, where the patient will suffer from headache, loss of consciousness, coma, vomiting, and even brain herniation due to brain hemorrhage and increased intracranial pressure, which eventually leads to the patient’s death due to respiratory failure.