This document discusses haemostasis in neurosurgery. It covers the importance of haemostasis in minimizing risks from bleeding during and after neurosurgery. The physiology of haemostasis involving vasoconstriction, platelet plug formation and coagulation is described. Preoperative assessment includes patient history, examination and investigations. Intraoperative techniques involve anaesthetic, surgical, pharmacological and mechanical methods to achieve haemostasis. Postoperative management focuses on wound care, antibiotics and elevation to prevent bleeding complications. Absolute haemostasis is essential for neurosurgery due to the devastating consequences of postoperative bleeding.