As the saying goes, “Bad teeth are full of disease.” Are your teeth particularly sensitive to changes in temperature, sweet and sour foods? You may have dental erosion. Dental erosion, also known as dental erosion, is the irreversible loss of the hard tissue of the teeth under chemical action without the involvement of bacteria, and GERD, a common gastrointestinal disorder, is one of the main causes of dental erosion. Typical symptoms of GERD are heartburn, acid reflux, belching, dysphagia and retrosternal pain, while atypical symptoms are asthma, chronic cough, hoarseness, non-cardiogenic chest pain, etc. Its oral manifestations are varied, which include burning sensation in the mouth, abnormal tongue sensation and dental erosion, and in severe cases, there is loss of vertical distance of the occlusion and facial aesthetic defects, etc. Dental erosion is the most important oral manifestation; In addition, there is a decrease in salivary flow rate and salivary buffering capacity, altered sense of taste, and damage to the oral mucosa. Dental erosion is one of the most important extra-esophageal manifestations of GERD, and its diagnosis and treatment require multidisciplinary collaboration. Early diagnosis of GERD and inhibition of acid reflux through lifestyle changes and medications are extremely important for preventing dental erosion and intervening in further loss of and damage to dental minerals.