What causes tongue pain when eating sour foods?
Eating acidic foods may cause tongue pain due to factors such as food irritation, tongue trauma, oral ulcers, glossitis, or burning mouth syndrome. Symptomatic treatment should be based on the specific condition. It is recommended to visit a hospital to determine the underlying cause and follow medical advice for treatment. Specific analyses are as follows:

1. Food irritation: Excessive consumption of acidic foods in the diet—such as seafood, fruits, and pickled vegetables—may lead to soreness of the oral mucosa. It is advisable to avoid acidic foods, maintain good oral hygiene, especially after consuming acidic foods, and drink plenty of warm water, which can help alleviate tongue pain.
2. Tongue trauma: Consuming food that is too hot or too hard may injure the tongue, resulting in wounds and pain. Under a doctor’s guidance, watermelon frost spray can be applied, and vitamin B and C supplements may be taken. Eating more fruits, legumes, and animal liver can promote healing.
3. Oral ulcers: Immune factors, nutritional deficiencies, and mental stress may contribute to the development of oral ulcers. When ulcers occur on the tongue, eating acidic foods can intensify irritation, causing pain along with a burning sensation, white ulcerated areas, and discomfort. Patients should promptly use medications such as cydiodine tablets, oral ulcer powder, or compound chlorhexidine dexamethasone film as directed by a physician.
4. Glossitis: Chronic irritation or infection may lead to inflammatory changes in the tongue, manifesting as redness, swelling, and pain. Acidic foods may further irritate the tongue and worsen pain, accompanied by swelling, diminished taste, and discomfort. Under medical supervision, patients may take medications such as Kouyanqing granules, cefaclor dispersible tablets, or cefradine capsules to aid recovery.
5. Burning mouth syndrome: Psychological factors or vitamin deficiencies may lead to burning mouth syndrome, commonly characterized by a burning sensation in the mouth. Pain may intensify when eating acidic foods and may be accompanied by stabbing pain, heat, and discomfort, often affecting the edges, dorsum, or tip of the tongue. Under medical guidance, medications such as ibuprofen sustained-release capsules, multivitamin tablets, or Jiawei Xiaoyao pills may be used for treatment.
In daily life, patients are advised to avoid overeating, especially excessive intake of acidic foods, as this may exacerbate tongue pain.