Traditional Chinese Medicine (TCM) internal medicine is a fundamental component of TCM, focusing on diagnosing and treating various diseases of the internal organs. Through TCM's unique diagnostic methods, known as the Four Examinations (inspection, listening and smelling, inquiry, and palpation), along with theories such as Yin-Yang, the Five Elements, and the internal organs and meridians, TCM practitioners provide differentiated treatment based on individual symptoms. Common treatments in TCM internal medicine include acupuncture, herbal medicine, cupping, and moxibustion, all aimed at regulating qi and blood, balancing Yin and Yang, and harmonizing organ functions to restore and maintain health.

TCM internal medicine covers a wide range of diseases, including respiratory diseases (such as cough and asthma), digestive diseases (such as stomach pain and diarrhea), cardiovascular diseases (such as hypertension and coronary heart disease), endocrine and metabolic disorders (such as diabetes), urinary system diseases (such as nephritis), immune system diseases (such as rheumatism), neurological diseases (such as insomnia and headaches), and gynecological conditions (such as menstrual disorders). TCM internal medicine emphasizes a holistic approach and the principle of "treating the root cause," aiming to achieve healing by adjusting the entire body.