There are several reasons for tongue discomfort: First, ulcers of the tongue mucosa. Ulcers can cause congestion, rupture and erosion of the mucosa on the surface of the tongue, which can cause pain in the tongue when eating and speaking. Second, the tongue mucosa suffering from flat moss or white spots and other mucosal diseases, flat moss will cause the back of the tongue with a white reticulation, or the appearance of white patches, accompanied by congestion, erosion. Third, tongue inflammation, chronic tongue inflammation will cause atrophy of the papillae on the surface of the tongue, resulting in a reddish, shiny tongue, also known as mirror tongue, the main clinical symptoms are tingling and numbness on the surface of the tongue, or accompanied by abnormal taste sensation. Fourth, suffering from oral dryness syndrome, closely related to their own immune dysfunction, due to the reduction of saliva secretion and lead to oral dryness, patients have burning sensation in the mouth, pain, as well as numbness of the tongue, abnormal taste symptoms. Fifth, burning mouth syndrome, the cause is unknown, the disease occurs mostly in menopausal or post-menopausal women, the dorsal mucosa of the tongue examination is normal, the patient’s tongue discomfort, burning-like pain, some have numbness and other abnormal sensations .