High-density shadows can be seen on CT head examination, which should be analyzed in conjunction with the patient’s clinical symptoms. If the patient does not have any clinical symptoms, the most likely cause of the high-density shadow on CT of the head is calcification, and the common site is in the falx cerebri and bilateral basal ganglia areas showing symmetrical calcified shadows. In the pallidum, pineal gland, and choroid plexus, there may be dotted, lamellar, and irregularly bordered high-density shadows due to normal physiological calcification. If the patient has hemiplegia, headache, numbness of the limbs, clumsy speech, or aphasia, or impaired consciousness, etc., high-density shadow in the CT head should be considered as caused by cerebral hemorrhage, and active treatment is needed. In the acute stage, nutritional support therapy, dehydration and lowering of cranial pressure should be given, and blood pressure should be strictly controlled to prevent further bleeding.