Tongue a little red in normal circumstances is usually the color of the dorsum of the tongue distributed on the bacillary papillae, disease conditions, may be the occurrence of bacillary papillitis or scarlet fever and other diseases, as follows. 1. Normal condition: red color of the bacillary papillae distributed on the mucosa of the dorsum of the tongue. 2. In case of disease: (1) Bacterial papillitis: the bacillary papillae are swollen and obvious, with a deep red color, often accompanied by swelling, congestion, burning, pain and other discomforts at the same time. (2) Scarlet fever: the papillae of the tongue may be swollen, congested and red, which is called “prune tongue” because of its prune-like appearance. There may be other reasons for a little redness on the tongue, so it is recommended to go to the hospital in time to see a doctor to clarify the cause of the disease and carry out targeted treatment.