The clinical manifestations of Cogan syndrome include ocular symptoms such as eye redness, pain, photophobia and blurred vision; and vestibular nerve symptoms such as vertigo, uncoordinated movements, nausea, tinnitus and hearing loss. Cogan syndrome, also known as Cogan syndrome, is a chronic inflammatory disease of unknown etiology, which may be due to autoimmune reaction, and its clinical manifestations mainly include eye symptoms and inner ear symptoms. 1. Eye symptoms: due to the chronic infiltration of inflammation, the eye appears red, swollen, hot and painful, accompanied by photophobia, and some patients may also have blurred vision. 2. Vestibular nerve symptoms: Vestibular neuropathy causes recurrent episodes of vertigo, uncoordinated movements, nausea, vomiting, tinnitus and hearing loss. When the above symptoms occur, it is recommended to go to the hospital in time, to clarify the cause of the disease, and then carry out targeted treatment.