Whether a slightly elevated density of the falx cerebralis is okay or not is a case-by-case analysis. Slightly elevated density of the cerebral falx is usually fine if it is a physiological calcification, but should be taken seriously if it is caused by a pathologic reason. 1. Physiological calcification of the cerebral falx refers to the deposition of calcium in the brain, if there are no uncomfortable symptoms, it is usually a normal physiological phenomenon, and generally do not need special treatment, regular observation. 2. Pathological increased density of the cerebral falx is usually caused by subarachnoid hemorrhage, infectious diseases and venous sinus thrombosis. (1) Subarachnoid hemorrhage: it is a common pathological factor, usually accompanied by headache, nausea, vomiting and other symptoms, in which the cerebral sickle shows significantly higher density in the image. (2) Infectious diseases: fungal and bacterial infections can lead to intracranial infections, and common intracranial infections include viral encephalitis, tuberculous meningitis, brain abscess, etc., which may lead to increased density of the cerebral sickle. (3) Venous sinus thrombosis: when there is venous sinus thrombosis, the density of the cerebral sickle will also increase, usually accompanied by headache and increased intracranial pressure. When checking out the increased density of the cerebral sickle, we should actively search for the cause of the disease and standardize the treatment to avoid delaying the disease.