Mannitol is usually infused once a day, but severe patients may need to be infused 3-4 times a day. Mannitol is mainly used for the treatment of increased intracranial pressure, cerebral edema and traumatic brain injury, etc. It is usually injected into the body through intravenous injection, and it can be infused once a day, only 250 ml at a time; if the patient’s condition is more serious, such as hemorrhagic cerebral infarction, acute cerebral edema that compresses the central nervous system, or the formation of cerebral hernia, etc., it is possible that the patient may need to infuse Mannitol 3-4 times a day, and the total amount of Mannitol will not be more than 1,000 ml. How many times a day to infuse mannitol is recommended to combine with the severity of the patient’s condition, and the professional doctor will give reasonable treatment advice, including the number of times a day to infuse, the use of dosage and so on. During the treatment with mannitol, it is necessary to pay attention to the control of the infusion rate, adjust the drip rate strictly according to the doctor’s instructions, and do a good job of monitoring the cardiac function, renal function and other aspects, so as not to cause cardiac or renal insufficiency. Specific treatment needs to consult the physician’s opinion.