Dizziness may be caused by postural hypotension, ear lesions, brain diseases and so on. 1. postural hypotension: a usually due to the squatting or lying state, suddenly get up quickly, resulting in the whole body blood can not disease redistribution, easily induced postural hypotension, a transient cerebral blood supply shortage, resulting in dizziness. 2. Ear lesions: for example, otolithiasis, Meniere’s disease, etc., after a sudden change in position, the position of the otoliths will also change, affecting the body’s sense of balance, the patient will experience symptoms of vertigo. 3. Brain diseases: If you suffer from cerebellar infarction, dizziness will occur when you get up suddenly, accompanied by unsteady walking, nausea and vomiting. In addition to the above factors, we can not rule out the possibility of other causes, and we suggest that we should consult a doctor in time to make a clear diagnosis and carry out standardized treatment.