Dizziness after lying down and getting up is generally called dizziness caused by change of position. It is more common in benign paroxysmal positional vertigo, and its incidence is very high, and its characteristic performance is that when changing position, patients may have transient vertigo when getting up or turning over, and each attack will not exceed one minute, and it may be accompanied by nausea without tinnitus or other neurological symptoms. The specific reason is that the otoliths are dislodged and reach the semicircular canal of the inner ear, stimulating the lymphocytes and causing vertigo, and when the semicircular canal changes with the change of position, the otoliths will move with the inner ear lymph and cause vertigo attacks. It can be treated by changing the position, but it is necessary to exclude the possibility of central positional vertigo, which is relatively rare, but has some risks, mainly due to sudden dizziness, rotation of vision and even syncope when changing the position. There is also the rare postural hypotension, where some patients may experience vertigo when changing position due to changes in blood pressure. Or the so-called cervical vertigo, which generally refers to vertigo caused by abnormal proprioceptive input due to tension imbalance in the neck muscles, can also occur when changing position and has a relatively low incidence.