Brudzinski’s sign is a leg raising test also known as Kernig’s sign, in which the patient is made to lie on his back with his legs straightened and his neck flexed forward, and symptoms of flexion of the two lower limbs and leg contraction are positive. Any subarachnoid infection such as encephalitis, meningitis or hemorrhage can be positive, but can be negative in deep coma. Therefore, patients should adjust their mind before the examination, have a normal rest and diet, and relax during the examination to prevent the examination from going smoothly due to nervousness. The examination does not require fasting and can be used by both men and women, and if there is a positive Brudzinski’s sign, it is most commonly seen in acute molluscum meningitis and tuberculous meningitis. The test is for patients with acute meningitis and tuberculous meningitis.