Vestibular function test is the most important test in otorhinolaryngology to clarify the cause of vertigo, only when the cause is clear can we say the next step of treatment. Vestibular function testing is a major sensation in the body. Vertigo is a subjective symptom of the human body, which is a disorder of orientation sensation or balance sensation of spatial relations, also known as motion illusion. When the patient opens his eyes, he has the illusion that the surrounding scenery rotates, shakes up and down or moves from side to side, while when he closes his eyes, he has the illusion of his own rotation or shaking, often accompanied by balance disorders, nystagmus, finger deflection, nausea, vomiting, pallor, sweating and change of pulse and blood pressure. Vertigo is only a symptom, but there are many diseases that cause vertigo, so vestibular function examination is important for the differential diagnosis of vertigo. What should I pay attention to before the vestibular function test? 1. Inform the examinee of past medical history, the presence of hypertension, cervical spondylosis, heart disease, etc., and take certain measures in advance for possible accidents. 2.Patients need to be positioned well during the examination, put on the eye patch, adjust the fixation band, loosen and tighten it appropriately, and the eye patch should be suitable to fully display the left and right eyes in the screen. Patients with vertigo often have psychological reactions to vertigo such as nervousness, fear and anxiety because of fear of vertigo, inappropriate movements and poor cooperation, so be prepared psychologically. Possible situations and responses during vestibular function examination Patients with vertigo generally have a sense of spinning, or dizziness in the head, unstable walking, or even nausea and vomiting. For patients with benign paroxysmal positional vertigo (BPPV), vertigo is often sudden and more intense, and people are used to closing their eyes during vertigo, plus the Dix-Hallpike test requires patients to do several consecutive fast movements such as lying down, sitting up and turning head, which may easily cause fall, it is necessary for nurses and family members to support and protect at the bedside, especially for elderly, cervical spine disease patients with difficulty in neck movement and stiff limbs, to assist in moving the patient’s torso to achieve the position required for the examination, and to pay attention to prevent the patient from falling out of bed. During the vestibular function examination, patients may experience nausea and vomiting. If vomiting occurs, immediately turn the head to the side to prevent accidental aspiration. If necessary, anti-dizziness and anti-emetic drugs can be injected intramuscularly to stop the examination. For the vestibular function examination of patients with combined cervical spondylosis, if the Dix-Hallpike test is done incorrectly, it can cause incontinence, paralysis and sometimes even life-threatening, so if the examination is necessary, the technique should be gentle and the speed should not be too fast. After the examination, the patient may still feel dizzy and dull, so do not get off the examination bed too early, but first relieve yourself. The examinee should actively take countermeasures such as relieving fatigue, relaxing emotion and appropriate physical exercise, which have positive significance for the prevention of vertigo. For patients with otoliths (BPPV), it is recommended to take the treatment of manual repositioning immediately, and after repositioning, the patient should preferably lie on the healthy side and avoid strenuous exercise. In conclusion, the vestibular function examination may be accompanied by that discomfort feeling of vertigo in patients, which is usually gradually relieved after rest, although accompanied by uncomfortable feeling, it is important for doctors to make a clear diagnosis and must be worthwhile.