Even though we have etiological factors that create disease, even those factors do not create disease if someone is balanced in spirit. So as acupuncturists and doctors of Chinese Medicine we always look to spirit first.
How is Qi or energy related to Emotions?
Fear causes Qi to descend often resulting in excessive urination, affecting the kidneys. Anger causes Qi to rise affecting the head and liver. Worry causes Qi to not move and get stuck or blocked, affecting the spleen.
"Yin and Yang are the dao of the heavens and earth, the grid and net of the ten thousand things, the mother and father of change and transformation, the root and origin of birth and death, the palace hosting the clarity of the shen. To treat the illness one must search for its root. And its root is always in spirit." Su Wen Chapter 5