Cerebral venous sinus thrombosis (CVST) is a rare condition where a blood clot forms in the venous sinuses of the brain. These sinuses are responsible for draining blood from the brain, and when a clot obstructs this flow, it can lead to increased pressure and swelling in the brain. Symptoms may include headaches, vision problems, and neurological deficits. CVST can occur due to various factors, including pregnancy, certain medications, and infections. Diagnosis typically involves imaging tests like MRI or CT scans. Treatment often includes anticoagulant medications to dissolve the clot and prevent further complications.