Home > Basic Principles > Understanding Kidneys from a TCM Perspective > Kidneys open into the ears
I. Essence (jing) | II. Water | III Grasping of qi | IV. Bones | V. Hair | VI. Ears | VII. Anterior & posterior orifices

TCM representation of kidney, sea of marrow, anterior & posterior orifices and large intestine.
6. Kidneys open into the ears

In TCM, the ears are conside red to be an opening to the kidneys. It is no surprise then that hearing relies on nourishment from essence stored in the kidneys. A famous TCM classic
Yilin Gaicuo (Errors Corrected from the Forest of Physicians) published in 1830 said, "The two ears communicate with the brain, and all the sound they perceive comes from the brain too." When kidney essence is transformed into the marrow, part of the marrow collects to form the "sea of marrow" which makes up the brain and spinal column, which are responsible for neurological functions as well as intelligence. If the kidney essence is abundant then so will be the sea of marrow resulting in acute hearing. However, if the sea of marrow is unable to be nourished by kidney essence then hearing disorders like tinnitus (ringing in the ears) or deafness appear. In the elderly, increasing deafness coincides with the age-related depletion of kidney essence.