Redness on both sides of the tongue is usually caused by lingual inflammation, which needs to be treated as soon as it is detected. Tongue inflammation refers to the inflammation of the tongue papillae distributed on the mucosal surface of the tongue, which in turn makes both sides of the tongue become red, because it belongs to the taste sensing organ, so tongue inflammation also affects the sense of taste, tongue papillae can be divided into filiform papillae, leaf papillae, fungal papillae, contour papillae, of which inflammation of the filiform papillae is mainly characterized by atrophy, which leads to redness, tingling, and taste disorders of the tongue, and so on. Tongue inflammation can be supplemented by the use of chlorhexidine type mouthwash treatment, the use of medication should be under the guidance of a professional doctor, not unauthorized use of medication.