The tongue is an important organ for people to perceive the sweetness and sourness of external food, and it can also reflect the health of the body when there are problems with the tongue, so be alert when there are cracks on the tongue. The following is an explanation of both Chinese and Western medicine. In Chinese medicine, cracks on the tongue may be caused by a deficiency of yin and blood and an exuberant internal heat. When there is a deficiency of Yin and Blood in the body, the blood is not enough to moisten the tongue, resulting in cracks on the tongue; at the same time, when there is a strong heat in the body, there is a lack of fluid in the body and there is not enough fluid to moisten the tongue, so the tongue will feel hot and thirsty, and cracks on the tongue will also appear. In Western medicine, cracks on the tongue are mainly caused by congenital factors and acquired factors. Some people are born with a cracked tongue, which may be caused by dysplasia of the tongue muscle. And the acquired factors may be when the patient suffers from lingual inflammation or atrophic lesions of the tongue papillae, the tongue may develop cracks. It is also related to bad habits, such as when often consuming spicy, easy to fire and other foods, some people will have tongue cracks. Therefore, it is important to develop good habits in daily life and to take care of your body and seek medical attention when tongue cracking occurs. Cracked tongue tends to accumulate bacteria and aggravate tongue infection, so it is important to pay attention to gentle and adequate cleaning of the cracked tongue.