Brain metastases edema treatment methods mainly include surgical treatment and medication. If the brain metastases are superficial and the location is not deep, surgical removal of the lesion is not too difficult, and the brain metastases can be removed through surgery. Generally speaking, the edema can subside on its own after the resection, and no special treatment is needed. If the location of brain metastases is deeper and cannot be treated by effective surgery, it can be treated with mannitol and other dehydration treatments as prescribed by doctor, which can also achieve better control effect. The formation of edema in brain metastases may be related to the size of brain metastases and the pathological type of primary foci, but not related to the location of brain metastases. This type of edema will show up more clearly on CT and can be several times, or even a dozen times, the size of the brain metastasis. When the edema of brain metastases is found, it is necessary to seek medical treatment in time and improve relevant examinations, and carry out standardized treatment under the guidance of doctors.