Return to the original intention: health preservation is to maintain the five internal organs. Disturbance of five internal organs will lead to five-element failure, such as disharmony between heart and kidney, stagnation of liver fire, weakness of spleen and stomach, blood deficiency and phlegm-heat imbalance, and further lead to insomnia, dreaminess, easy awakening, tinnitus, palpitation and shortness of breath, flatulence, loose stool, night sweats, stagnation of damp heat, stagnation of liver qi, irregular menstruation and hyperplasia of mammary glands.