Venous sinus thrombosis is a condition where a blood clot forms in the venous sinuses of the brain. These sinuses are responsible for draining blood from the brain back to the heart. When a clot occurs, it can block blood flow, leading to increased pressure in the brain and potential damage to brain tissue. Symptoms of venous sinus thrombosis can include headaches, vision problems, and neurological issues. It can be caused by various factors, such as pregnancy, infections, or certain medical conditions. Early diagnosis and treatment are crucial to prevent complications and improve outcomes.