Bleeding in the esophagus has several possible causes.
And if you have any of the symptoms of acute GI bleeding, you should seek emergency treatment immediately.
This article breaks down possible causes and symptoms of bleeding in the esophagus.

jose luis pelaez inc / Getty Images
It also covers the diagnosis and treatment of GI bleeding.
Acute GI bleeding is severe and possibly sudden.
and prevent a recurrence.
Endoscopic treatments don’t control bleeding in every case.
Summary
Bleeding in the esophagus can have multiple causes and may be serious or even fatal.
Diagnosis centers around a physical exam, lab testing, and scoping or upper GI X-raying.
2014;5(4):467-78. doi:10.4291/wjgp.v5.i4.467
National Heart, Lung, and Blood Institute.Anemia Symptoms.
2015;25(3):491-507. doi:10.1016/j.giec.2015.03.004
Johns Hopkins Medicine.Gastrointestinal Bleeding or Blood in the Stool.
Mayo Clinic Staff.Esophageal Varices.
National Institute of Diabetes and Digestive and Kidney Diseases.Symptoms and Causes of GI Bleeding.
U.S. Department of Health and Human Services.