Mouth ulcers, which are also a type of erosion of the oral mucosa, can occur anywhere in the mouth such as the lips, the body of the tongue, the lingual papillae, or under the tongue. This condition is relatively common, and it is suggested that patients can apply oral ulcer sprays or stomatitis sprays locally to the affected areas. There are also oral ulcer lozenges available that can be held in the mouth over the ulcerated surface, which are quite effective in treating mouth ulcers. Dandelion has the effect of clearing heat and detoxifying. When suffering from mouth ulcers, drinking dandelion tea can be beneficial. However, when mouth ulcers are painful, it is recommended that patients apply local medications, as this method is more direct and tends to be faster. Dietary considerations should include eating lightly and avoiding spicy and irritating foods. (Medication should be used under the guidance of a professional doctor.)