What causes tooth marks on the edges of the tongue?

Under normal circumstances, tooth marks on the edges of the tongue may be caused by changes in oral pressure, tongue swelling, indigestion, hyperthyroidism, or other reasons. If discomfort occurs, it is recommended to seek medical attention promptly. Specific analyses are as follows:

1. Dry mouth

When saliva secretion in the mouth is insufficient, the surface of the tongue may become dry and more susceptible to friction from teeth, potentially leading to tooth marks on the edges of the tongue. It is important to maintain adequate daily fluid intake.

2. Changes in oral pressure

Chewing hard objects or clenching teeth tightly during sleep can exert pressure from the teeth onto the tongue, resulting in temporary tooth marks along the tongue's edges. Maintaining healthy oral hygiene habits and avoiding excessive chewing of hard foods in daily life is recommended.

3. Tongue swelling

Tongue swelling may result from mild allergic reactions or food irritants, causing a slight increase in tongue volume and contact with teeth that leads to tooth marks. It is important to avoid known food allergens in daily life.

4. Indigestion

Overeating or consuming greasy foods can easily lead to indigestion, which affects nutrient absorption and may cause deficiencies in vitamins and minerals, resulting in tooth marks on the edges of the tongue. This condition may be accompanied by symptoms such as bloating, stomach discomfort, and loss of appetite. Treatment may include medications such as Jianwei Xiaoshi tablets, Domperidone tablets, or Hawthorn pills, used according to medical advice.

5. Hyperthyroidism

Hyperthyroidism is associated with genetic factors and prolonged mental stress, causing accelerated metabolism throughout body tissues, which alters the texture and shape of the tongue and leads to tooth marks. Symptoms may include palpitations, hand tremors, and excessive sweating. Medications such as Methimazole tablets, Potassium Iodide tablets, or Levothyroxine Sodium tablets may be used under a doctor’s guidance.

Maintaining good oral and dietary habits, along with a daily fluid intake of 1500–2000 mL, are important measures for preventing tooth-marked tongue.