Cavernous Sinus Thrombosis (CST) A rare but life-threatening condition where a blood clot forms in the cavernous sinus, a vein at the base of the brain that drains blood from the face. 🧠 Causes: Usually a complication of facial or sinus infections (especially around the eyes or nose). ⚠️ Symptoms: • Severe headache • Swelling/redness around one or both eyes • Eye pain or double vision • Fever, confusion, or vision loss 🚨 Why it matters: Infection can quickly spread to the brain. making CST a t