The causes of sudden tinnitus in the ears include mental factors, ear diseases and intracranial diseases. 1. Mental factors: excessive stress, prolonged sleep deprivation, prolonged exposure to noisy environments, excessive use of headphones or sudden mental stimulation may cause sudden tinnitus in the ears. 2. Ear diseases: Viral infection in the ear, ear trauma, purulent otitis media, cerumen or foreign body embolism in the ear canal, acoustic neuroma, Meniere’s disease, and other ear diseases may cause sudden tinnitus in the ear, with or without hearing loss, vertigo, and so on. 3. Intracranial diseases: such as cerebral blood supply insufficiency, acute cerebrovascular disease, intracranial tumors, etc. may cause sudden tinnitus. When sudden tinnitus occurs, it is necessary to consult a doctor in time to clarify the cause of tinnitus and then reasonably treat it.