The symptoms of redness and pain in the tongue are caused by general discomfort, such as endocrine, metabolic disorders, and vitamin B deficiency. Any tongue with burning pain, spicy pain, numbness, astringency and other sensations are called tongue pain, which can be painful in different parts of the tongue such as tip, edge, heart, root or whole tongue. So, how do patients differentially diagnose painful red tongue syndrome? The following is a brief introduction: 1, painful tongue syndrome: in addition to map tongue, grooved tongue, tongue papillitis and other tongue inflammation, or trigeminal neuralgia and other causes of tongue pain, clinical patients complaining of painful sensation in the tongue, but can not detect positive signs, histopathology without features, the tongue body softness, mobility is normal called tongue pain. This syndrome often disappears temporarily when the patient concentrates on a certain task, and there is burning-like pain, dull pain, or pins-and-needles pain in the tongue, but it has no effect on language or diet. In addition to tongue pain, other oral mucosa also has burning-like pain, then it is called burning mouth syndrome. 2, tongue inflammation: inflammation of the tongue with redness, swelling, heat and pain. 3.Tongue pain: Tongue pain is a condition in which there is burning pain, spicy pain, numbness, astringency and other sensations in different parts of the tongue such as the tip, the edge, the heart, the root or the whole tongue.