The mechanism of the treatment of acupuncture for depression can be explained as follow, which can be understood easily by public with any knowledge of TCM theory:

According to TCM theory, depression is the result of the heart, liver, spleen and kidney dysfunction. By selecting proper points, patients can reach the state with calming mind down, toning kidney, strengthening spleen, soothing liver, so that QI ( Qi is the energy of the body, of the meridians, of food, of the universe.) of five viscera can be reconciled, viscera function gradually become normal, the patient can go back to normal and healthy.