Tongue without moss and redness may be atrophic lingual inflammation, and its causes may be anemia, nutrient deficiency, dry syndrome, Candida infection, etc., as follows. 1. Anemia: all types of anemia may cause atrophic glossitis, such as pernicious anemia caused by lack of internal factors, hypochromic microcytic anemia caused by iron deficiency, and so on. 2. Nutrient deficiency: niacin, vitamin B2, vitamin E and other deficiencies can cause atrophic glossitis. 3. Dry syndrome: it is a chronic inflammatory autoimmune disease that involves exocrine glands, and atrophic glossitis is often seen. 4. Candida infection: acute erythematous candidiasis is mainly manifested as mass atrophy of the dorsal papilla of the tongue and congestion of the mucosa. There may be other reasons for the tongue to be mossless and red, it is recommended to go to the hospital in a timely manner to clarify the cause of the disease for targeted treatment.