Retention of urine. Auricle is a small extension of the body which is of immense use, not only for collecting sound waves, but for acupuncture treatment too. Small branches of important nerves innervate the auricle. In TCM, it is said that all the yang channels meet in the auricle. We can see that Gall Bladder channel encircles the auricle as if protecting the auricle.
Urinary bladder is the mother of gallbladder.
Naturally the son takes care of the UB and K Channels. It is therefore important to keep the GB channel very healthy in this age. The diseases of the yang organs heal faster than yin organs by using auricular needling. Yang organs are hollow organs and therefore healing is accessed very fluently from inner and outer side of the organs. Hence, it takes more time to heal the yin organs.