Cracked tongue is clinically known as cracked tongue, also can be called cracked tongue, wrinkled tongue, etc. Looking at the tongue shows that there are longitudinal and transverse cracks on the dorsal surface of the tongue, commonly due to abnormal development of the tongue, clinically according to the cracks can be divided into two categories, one for the leafy vein type and one for the brain pattern type. Fissures on the tongue are dominantly inherited and are congenital developmental abnormalities, which can have a family history. The fissures gradually expand with age and physical development, and can also be influenced by external conditions such as geographical and environmental factors, nutritional absorption and endocrine, etc. There can also be limited fissures and recurrence during the female menstrual cycle. When there is a cracked tongue with facial palsy and nerve palsy, it can be called May-Ro syndrome. Cracked tongue can also be seen as a late surface sign of systemic pustular psoriasis and continuous acrodermatitis. When there are cracks, oral hygiene should be maintained to avoid bacterial infection. The residue retained in the furrow needs to be removed regularly, and the mouth can be rinsed with water or mouthwash after meals. If there is inflammation in the cracks, antibiotic paste needs to be applied to the cracks to avoid aggravating the infection. There is no effective treatment for tongue fissures for the time being. In daily life, spicy and stimulating foods should be prohibited, and a light diet should be taken, and oral conditions should be checked regularly to prevent oral infections.