Chemical injury can be prevented by storing dangerous chemicals in a safe place. Other injury can be prevented by careful medical procedures. Nasogastric tubes should be used only as long as necessary. Acid damage to the esophagus can be prevented by treating gastroesophageal reflux disease.
Depending on the cause, narrowing can progress to total blockage. Narrowing that is not relieved can lead to poor malnutrition and weight loss. Total blockage can cause regurgitation of food and liquid into the lung. There, these materials can cause inflammation and breathing problems, known as aspiration pneumonia. Esophageal cancer can spread and lead to death.
There is no risk to others.