The absence of tongue moss may be due to atrophic linguitis, tongue moss, spleen and stomach deficiency cold, etc. The absence of tongue moss is a common manifestation of atrophic linguitis, which usually appears as filiform papillitis. The main causes of atrophic linguitis are hematological diseases, malnutrition, vitamin deficiency, fungal infection, endocrine disorders, etc. In addition, if drug abuse, anemia, long-term smoking, long-term drinking, long-term betel nut chewing, may also lead to atrophic linguitis. If there is a lack of vitamins or trace substances in the body, it may cause tongue fungus, which results in a tongue with no tongue coating. If the tongue is red and there is no tongue lining, it may be due to deficiency of cold in the spleen and stomach. The absence of tongue lining is a more serious condition and should be treated promptly by a doctor to clarify the specific cause so as to improve the absence of tongue lining.