The causes of always feeling sick and nauseous in motion sickness are considered to be aurogenic diseases, auditory neuropathy, lesions of the brainstem and medulla oblongata, ventricular tumors and cysts, and cerebral lesions. 1. Otogenic diseases: some other systemic diseases caused by ear lesions. Such as purulent otitis media, mastoiditis, Meniere’s disease, benign episodic positional vertigo, etc. 2. Eighth pair of cranial nerve and auditory nerve lesions: possible lesions include nerve sheath degeneration, demyelination, nerve conduction disorders, and acoustic neuroma. 3. Lesions of the brainstem and medullary pons: brainstem hemorrhage and brainstem tumors, brainstem encephalitis, medullary cavernous disease, multiple sclerosis, and so on. 4. Ventricular tumors and cysts: tumors of the cerebellar peduncle, cerebellar injury, cerebellar abscess. 5. Brain lesions: temporal lobe tumors or vascular lesions, temporal lobe epilepsy and so on will appear motion sickness and nausea. It is recommended to go to the hospital for active consultation to clarify the cause of the disease.