If small nodules appear in the brain, whether surgery is needed depends on the nature of the nodules. If they are tumors, surgery is recommended to remove them, if they are calcified foci, surgery is not needed, as follows: 1. Surgical removal: Most of the small nodules appearing in the brain are considered to be brain tumors, usually whether benign or malignant, once found, they should be treated through surgery. The tumor will be completely removed under the microscope and a small amount of tumor tissue will be left for pathological examination after surgery. 2. No surgical treatment: Some patients may have localized calcification foci, especially in the body of bilateral lateral ventricles, which may be more obvious. For calcified foci in the brain, surgery is generally not recommended for treatment, and regular attention to observation and follow-up is sufficient, often without special treatment. Therefore, when a small nodule is found in the brain, the first option is to visit your local hospital and ask a neurosurgeon to help determine the current situation.