There are more reasons for the formation of brain nodules, and several common causes include chromosomal genetic diseases, calcification of brain tissue, brain tumors, and brain parasitic diseases. Patients need to go to the hospital to find out the cause of the disease, and then carry out symptomatic treatment: 1. Chromosomal genetic disease: such as neurofibromatosis type I, a common chromosomal dominant genetic disease in the central system. There are two forms of subcutaneous tumors, one is scattered hard nodules attached to a nerve, which can be moved and can also cause pain or sensory abnormalities; the other is diffuse neurofibroma of the nerve trunk and its branches, which is often accompanied by the overgrowth of subcutaneous tissues; 2. Calcification of brain tissues: calcified nodules shown on the brain imaging, mostly seen in the pineal gland or contraction of choroidal and other calcification, which is a normal calcification of tissues, can be observed. Don’t worry too much, you can continue to observe. If the nodule continues to increase in size and compresses the surrounding normal tissues, it needs to be removed surgically; 3. Brain tumor: intracranial tumors can also form nodules, it is recommended to perform imaging tests to clarify the nature of intracranial tumors and provide symptomatic treatment; 4. Brain parasitism: Neurological parasitic infections, including Cysticercus cerebralis, Schistosoma haematobium, Echinococcus tapeworms and so on, parasitize in the brain parenchyma, spinal cord, ventricles and subarachnoid space causing cell necrosis and calcium deposition, forming nodules. Calcium deposition, the formation of nodules, caused by brain damage. In addition, diseases such as irregular living habits, hypertension, hyperlipidemia and diabetes mellitus may affect the cerebral blood vessels to a certain extent, which may also cause the production of brain nodules.