In addition to its auditory function, the ear can also perceive the sense of balance. The ear is anatomically divided into the outer ear, middle ear and inner ear. The outer ear includes the auricle and the external auditory canal, which mainly serve the function of collecting sound waves; the middle ear includes the tympanic chamber, the tympanic sinus, the mastoid process and the eustachian tube, which amplify sound waves to the inner ear; and the inner ear includes the vestibular organs and the cochlea, which are the main organs in charge of balance perception and hearing.1. Balance perception function: The vestibular organs of the inner ear include the semicircular canal, the ellipsoidal sac and the balloon, which are The vestibular organ in the inner ear has a semicircular canal, an ellipsoidal sac and a balloon, which are balance receptors that sense changes in head position. In people with sensitive vestibular organs, afferent impulses cause a strong response in the relevant parts of the center during linear and rotational variable speed movements, resulting in dizziness, nausea, vomiting, sweating, etc. This is commonly referred to as motion sickness and seasickness. 2. Auditory function: There are auditory receptors in the cochlea of the inner ear, and the afferent nerves of the auditory receptors and balance receptors are combined to form a bit of the auditory nerve, which is caused by the vibration of the auditory tuberosity in the cochlea. The vibration of the auditory tuberosity causes the vibration of the lymph in the cochlea, which stimulates the receptors in the inner ear. The nerve impulses generated by the excitation of the auditory receptors are transmitted along the auditory nerve to the auditory center of the cerebral cortex to produce hearing. To better protect the ear and its functions, it is recommended to avoid excessive use of the ear in daily life, such as listening to music at high volume, being in a noisy environment, frequent ear picking, and blowing the nose hard to avoid damaging the internal structure of the ear and causing the backflow of unclean substances into the middle ear, which can lead to ear diseases.