Dizziness and nausea when sitting up and relief when lying down may be benign paroxysmal positional vertigo or persistent postural perceptual dizziness. Benign paroxysmal positional vertigo: This is a kind of vestibular peripheral vertigo, which has a direct correlation with changes in body position, and the main cause of its development is the dysfunction of the cochlea as a balance organ. Benign paroxysmal positional vertigo is usually associated with head rotation, with left otolithiasis usually presenting when the head is turned to the left and right otolithiasis when the head is turned to the right. The main symptomatic treatment is symptomatic treatment, and restoration treatment is given at the same time. Symptomatic treatment drugs mainly include vertigo stop and pethidine and so on. Second, persistent postural perceptual dizziness: it is a kind of chronic dizziness that is more common in clinic, and the core criteria include: 1, persistent non-rotational dizziness and subjective sense of imbalance for 3 months or more; 2, high sensitivity to motion: lasts for ≥3 months; 3, visual vertigo.