Overfeeding is the number-one cause of high nitrate levels in aquariums. Overfed fish produce much more waste than normal, and when more food is given than they can take in, the uneaten food rots and produces even more wastes. Keeping too many fish in a tank also leads to problems with accumulated wastes.
Symptoms Caused By Esophageal Ulcer. One classic symptom is a dull or burning pain. It is common with all forms of peptic ulcers. The affected person may feel the pain radiating within the areas starting from the navel up to the breastbone.
Anxiety also increases the sensitivity of the esophagus so the sensation is more severe. GERD can also cause esophagus ulcers. An ulcer is an open sore that, in this case, is located in the esophagus. Some symptoms are pain, nausea, heartburn and chest pain, according to the University of Minnesota Medical Center. Barrettâs esophagus is a condition that may occur when the lining of the esophagus changes to be more like the lining of the intestine, according to The National Institute of Diabetes and Digestive and Kidney Diseases.