Calcification foci in the brain refers to the appearance of bone in parts of the brain where there is no bone, which is a relatively common phenomenon and can often be divided into physiological calcification and pathological calcification. 1. Physiological calcification: physiological calcification is more common, and the chance of calcification foci increasing with age, often occurring in different parts of the brain, such as choroid plexus calcification, pineal gland and rein calcification, basal ganglia calcification, dural calcification, and Calcification of the dentate nucleus of the cerebellum. This calcification is basically a normal physiological phenomenon, usually not accompanied by other symptoms, and usually does not require special treatment; 2. Pathological calcification: pathological calcification is generally due to the gradual deposition of calcium salts in the brain after a long period of inflammation or hemorrhage and other lesions, which may cause calcification foci in the brain. There are many causes of calcification foci in the brain, such as intracranial infections, parasitic diseases, abnormal calcium metabolism caused by endocrine and metabolic diseases, etc. Diseases of the brain, such as brain tumors, cerebral vascular sclerosis, cerebral tuberculosis, and cerebral hemorrhage, may also cause calcified foci in the brain. If the calcification foci are frequent and appear in the blood vessels of the brain, they may affect the normal operation of blood, resulting in insufficient blood supply to the brain and symptoms such as dizziness, headache, or blurred vision. If the calcified foci squeeze the nerves, they may cause headache, vomiting, or squeeze the optic nerve, which may lead to blurred vision.