Echo in one ear may be caused by stuffy and blocked feeling in the ear, which is commonly seen in secretory otitis media, tinnitus, cerumen impaction, and so on. 1. Secretory otitis media: secretory otitis media may be secondary to rhinitis, pharyngitis, laryngitis and other respiratory tract infections, which can lead to dysfunction of the Eustachian tube, negative pressure in the tympanic chamber and accumulation of fluid in the tympanic chamber, which can lead to the situation of hearing sound echo. 2. Neurogenic tinnitus: Due to insufficient blood supply to the inner ear and poor microcirculation in the inner ear, tinnitus and hearing loss may result in resonance sound and echo after noise stimulation. 3. Cerumen embolism: If the cerumen in one side of the external auditory canal is blocked, a relatively closed cavity can be formed between the cerumen and the tympanic membrane, which in turn produces echoes when the sound is transmitted or when the air vibrates. It is recommended that the patient actively seek medical treatment, check the cause of the disease, and actively cooperate with the doctor to treat the disease after the cause of the disease is clarified.