Dizziness is commonly caused by neurological disorders, diseases of the ear, and internal diseases that affect the peripheral and central vestibular organs. 1. Neurological diseases: such as cerebral ischemic lesions, cerebellar lesions, brain lesions, traumatic brain injury, epilepsy, and vegetative dysfunctions can cause dizziness. 2. Ear diseases are commonly caused by: ① Meniere’s disease: it is the main cause, with episodes of vertigo with tinnitus, hearing loss and nystagmus, and in severe cases, it can be accompanied by nausea, vomiting and pallor, etc. Its episodes usually do not exceed 2 weeks and are recurrent. (ii) Labyrinthitis: Mostly caused by otitis media, episodes of vertigo with tinnitus, hearing loss and nystagmus, and examination may reveal tympanic membrane perforation. ③Vestibular neuronitis: vertigo mostly appears after fever or upper respiratory tract infection, accompanied by nausea and vomiting. ④Internal ear drug poisoning: mostly progressive vertigo with tinnitus and hearing loss. It is often caused by poisoning damage of drugs such as streptomycin and gentamicin. ⑤ Benign paroxysmal positional vertigo: often caused by special evoked positions, vertigo and nystagmus occur when the head is in a certain position. All of these inner ear diseases can cause dizziness and vertigo. 3. Internal diseases, commonly found in: hypertension, hypotension, various cardiovascular and cerebrovascular diseases, anemia, infection, poisoning, hypoglycemia, etc. If dizziness occurs, you should go to the hospital for treatment in time to determine the cause and treat the cause.