Echo in the ear may be physiologic, or it may be related to pathological factors such as foreign bodies in the external auditory canal or cerumen embolism, middle ear diseases, inner ear diseases, and sudden deafness. 1. Physiological factors: If there are echoes in the ear when water enters the ear during shampooing, bathing or swimming, the symptom of echoes in the ear can disappear immediately after the water is wiped out with cotton swabs. 2. Pathological factors (1) Foreign body or cerumen embolism in the external ear canal: If hair, foreign body or excessive cerumen falls out of the external ear canal and touches the eardrum when digging the ear, the symptom of echoes in the ear may occur. (2) Middle ear diseases: For example, in secretory otitis media, there may be negative pressure in the middle ear or even effusion in the middle ear. At this time, due to the dysfunction of the Eustachian tube, it may cause abnormal conduction in the confined space of the ear, resulting in the symptom of echoes in the ear, which is often accompanied by stuffiness in the ear. The main causes of secretory otitis media include colds and adenoid hypertrophy. (3) Inner ear diseases: such as cochlear ischemia, although the symptoms of hearing loss, but part of the sound will cause the patient to produce a piercing sense of metal, i.e., the ear may appear echoes of the symptoms. (4) Sudden deafness: patients with this disease mostly complain of echoes in the ears when others speak, which may be accompanied by hearing loss + tinnitus and other symptoms. If the symptoms of echoes in the ears and long-term non-relief or even aggravation, it is recommended to go to the hospital in a timely manner to identify the cause of the disease and carry out the right treatment to avoid delays in the condition.