Normal tongue dorsum is light pink in color with a white and thin layer of tongue moss on the surface. When there is redness in the middle and whiteness on both sides, this condition may present with median rhomboglossitis. In the case of rhomboid tongue inflammation, the back of the tongue is smooth, reddish in color, and the papilla of the tongue is absent. The surrounding area is normal tongue tissue with a white tongue covering. It may be a congenital deformity of the organism developmental malformation tongue development process, odd nodule failed to protrude into the lateral protrusion of the formation of the papillary area of the congenital deformity, but also may be caused by Candida infections, endocrine disorders, or other diseases such as diabetes mellitus, microvascular injuries, and metaplastic diseases. Normal tongue red in the middle and white on both sides for the manifestation of abnormality, it is recommended to go to the hospital in time for examination and timely treatment.