A glimpse of a “spot” can reveal the whole “leopard”. This is reflected in Chinese medical theory, such as looking at the nails, face color, lip color, etc. can help identify disease, and in addition to these more common methods, observation of the teeth and gums, also has a similar effect. According to Chinese medicine, the kidney is the master of bone and produces marrow, and the teeth are the remainder of the bone. The teeth and gums are closely related to the kidneys, the stomach and the large intestine, so observing the teeth and gums can be a preliminary indicator of kidney and gastrointestinal pathology. The warm disease school of Chinese medicine attaches great importance to the identification of the teeth and gums. Cao Qifu, Department of Integrative Cardiology, China-Japan Friendship Hospital Sparse teeth or exposed tooth roots may indicate a deficiency of kidney energy. Teeth are most closely related to the kidneys, so if a person’s teeth are not well developed, the kidneys are usually not well developed. If an adult has sparse teeth, exposed roots, or gums that are bleeding, yellow and withered, or shrunken gingival flesh, he or she has a deficiency of kidney qi and should be alert to any kidney disease. If a child’s teeth do not grow for a long time, it may also be due to a deficiency of kidney qi, and can be applied under the guidance of a doctor such as Liu Wei Di Huang Wan. Red and swollen gums, gastritis or fatigue. According to Chinese medicine, gums are related to the stomach and intestines. If there is simple redness and swelling of the gums, it is mostly due to inflammation of the stomach fire and may also be related to gastritis; if the redness and swelling are accompanied by symptoms such as loose teeth and strong bad breath, it is mostly periodontal disease. The reason for this disease, in addition to insufficient calcium intake or poor brushing, is also related to lowered immunity caused by overexertion. Bleeding gums and poor digestion. Gums bleed easily not only in patients with gingivitis or periodontal disease, but also in people with poor gastrointestinal tendencies, who should eat less spicy and other stimulating foods. If the gap between the teeth becomes wider accompanied by bleeding gums, it is common in diseases such as diabetes and hyperthyroidism; if the teeth become black or have a cold feeling, the teeth become long and stained, and the tooth flaps become yellow like beans in the course of illness, it is mostly a sign that the disease becomes serious and you should be alert. Loose teeth, one of the signs of osteoporosis. The main reason for loose teeth falling off is due to the unstable alveolar bone, which is mostly caused by osteoporosis. In this case, we can prevent it early, such as taking calcium tablets early, doing regular physical exercise, and knocking the teeth frequently. In addition, loose tooth loss and unclean teeth may imply a potential risk of cardiovascular disease. Some surveys show that older people who lose a lot of teeth have a high risk of stroke. Therefore, chewing more often may help prevent cardiovascular disease. And conversely, people whose hearts are already not so good should also make it more important to develop the habit of rinsing their mouths after meals.