The main causes of tongue redness are as follows: 1, suffering from tongue inflammation, tongue inflammation refers to the inflammation of the lingual papillae, the taste receptors distributed on the mucosal surface of the tongue, which are divided into four types: filiform papillae, fungiform papillae, foliar papillae and contour papillae. Inflammation of filiform papillae is mainly based on atrophy, resulting in redness, smoothness, tingling and taste sensory impairment of the tongue; 2, ulceration of the tongue mucosa, which causes congestion, redness, swelling and ulceration of the tongue mucosa with severe pain; 3, herpetic stomatitis or fungal stomatitis, where herpes virus and fungal infection cause congestion, redness, swelling, blistering and erosion of the tongue surface; 4, systemic factors, such as cold, fire, etc. can also cause redness of the tongue. can cause redness of the tongue. Patients with red tongue should not eat hot and spicy food, drink more water, and keep their diet light. In case of viral and fungal infections, you can take oral anti-viral oral solution or grind mycophenolate tablets into powder to coat the tongue surface.