Learn about what is Schatzki rings, a tissue constriction in the lower esophagus that can lead to dysphagia and heartburn. Symptoms may include chest pain, regurgitation of food, and feeling of fullness in the throat. Causes of Schatzki ring can include bacterial infection, damage from a medical procedure, and excessive scarring from acid reflux disease. Diagnosis is usually made with an endoscopy. Treatment often involves endoscopic dilation or use of medications to relax the esophageal muscles. Other options may include surgery and lifestyle modifications.