Stomach discomfort accompanied by significant nausea as well as back pain may be due to gastric ulcer. If a stomach ulcer is not effectively treated for a long time, it can lead to a gradual decrease in appetite, which can also cause symptoms such as obvious anorexia, nausea and vomiting. The reason why there is back pain is due to complications caused by gastric ulcer, which leads to serious bleeding in the digestive tract, also accompanied by serious erosion and other phenomena.